chore: regenerate README (#6)

This PR was generated using Autosynth. 🌈


<details><summary>Log from Synthtool</summary>

```
2021-05-12 17:18:12,054 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-dms/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-05-12 17:18:13,096 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

```
</details>

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https://source.cloud.google.com/results/invocations/624038a7-0c48-4a12-84bb-163cbdf1c75f/targets

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.github/readme/synth.metadata/synth.metadata

@@ -0,0 +1,18 @@
+{
+  "sources": [
+    {
+      "git": {
+        "name": ".",
+        "remote": "https://github.com/googleapis/java-dms.git",
+        "sha": "c406e50b2c3264d28f35f2b00fd08653d19ad9ce"
+      }
+    },
+    {
+      "git": {
+        "name": "synthtool",
+        "remote": "https://github.com/googleapis/synthtool.git",
+        "sha": "c0edb1b97d81f56eaba1e896e9756268940c56c1"
+      }
+    }
+  ]
+}

README.md

@@ -8,9 +8,6 @@ Java idiomatic client for [Database Migration Service][product-docs].
 - [Product Documentation][product-docs]
 - [Client Library Documentation][javadocs]
 
-> Note: This client is a work-in-progress, and may occasionally
-> make backwards-incompatible changes.
-
 ## Quickstart
 
 
@@ -22,6 +19,7 @@ If you are using Maven, add this to your pom.xml file:
   <artifactId>google-cloud-dms</artifactId>
   <version>0.0.0</version>
 </dependency>
+
 ```
 
 If you are using Gradle without BOM, add this to your dependencies
@@ -56,9 +54,7 @@ to add `google-cloud-dms` as a dependency in your code.
 ## About Database Migration Service
 
 
-[Database Migration Service][product-docs] makes it easier for you to migrate 
-your data to Google Cloud. This service helps you lift and shift your MySQL and 
-PostgreSQL workloads into Cloud SQL.
+[Database Migration Service][product-docs] makes it easier for you to migrate your data to Google Cloud. This service helps you lift and shift your MySQL and PostgreSQL workloads into Cloud SQL.
 
 See the [Database Migration Service client library docs][javadocs] to learn how to
 use this Database Migration Service Client Library.
@@ -86,9 +82,6 @@ Java 7 or above is required for using this client.
 This library follows [Semantic Versioning](http://semver.org/).
 
 
-It is currently in major version zero (``0.y.z``), which means that anything may change at any time
-and the public API should not be considered stable.
-
 ## Contributing
 
 
@@ -116,7 +109,7 @@ Java 11 | [![Kokoro CI][kokoro-badge-image-5]][kokoro-badge-link-5]
 
 Java is a registered trademark of Oracle and/or its affiliates.
 
-[product-docs]: https://cloud.google.com/appengine/docs/admin-api/
+[product-docs]: https://cloud.google.com/database-migration/docs
 [javadocs]: https://googleapis.dev/java/google-cloud-dms/latest/index.html
 [kokoro-badge-image-1]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-dms/java7.svg
 [kokoro-badge-link-1]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-dms/java7.html
@@ -128,7 +121,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-4]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-dms/java8-win.html
 [kokoro-badge-image-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-dms/java11.svg
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-dms/java11.html
-[stability-image]: https://img.shields.io/badge/stability-beta-yellow
+[stability-image]: https://img.shields.io/badge/stability-ga-green
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-dms.svg
 [maven-version-link]: https://search.maven.org/search?q=g:com.google.cloud%20AND%20a:google-cloud-dms&core=gav
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
@@ -142,4 +135,4 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [enable-billing]: https://cloud.google.com/apis/docs/getting-started#enabling_billing
 [enable-api]: https://console.cloud.google.com/flows/enableapi?apiid=dms.googleapis.com
 [libraries-bom]: https://github.com/GoogleCloudPlatform/cloud-opensource-java/wiki/The-Google-Cloud-Platform-Libraries-BOM
-[shell_img]: https://gstatic.com/cloudssh/images/open-btn.png
+[shell_img]: https://gstatic.com/cloudssh/images/open-btn.png