chore: regenerate README (#174)

This PR was generated using Autosynth. 🌈


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

```
2020-10-16 00:06:30,576 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-grafeas/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-10-16 00:06:31,529 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

```
</details>

Full log will be available here:
https://source.cloud.google.com/results/invocations/624001e2-b331-4e02-9451-0fce89ac7c2d/targets

- [ ] To automatically regenerate this PR, check this box.

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

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-grafeas.git",
-        "sha": "2debd9893402606fed0d85f7492b73d133815755"
+        "sha": "10f444f146daef00e0c122ec2b79d914ff8e1dd9"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "b6164c26a111f7f587099d31253abb96b5737bb2"
+        "sha": "7c5370937dd9ba9dcf9cd7d2af880a58b389b4f1"
       }
     }
   ]

README.md

@@ -21,8 +21,6 @@ If you are using Maven, add this to your pom.xml file:
 </dependency>
 ```
 
-[//]: # ({x-version-update-start:grafeas:released})
-
 If you are using Gradle, add this to your dependencies
 ```Groovy
 compile 'io.grafeas:grafeas:1.0.2'
@@ -31,7 +29,6 @@ If you are using SBT, add this to your dependencies
 ```Scala
 libraryDependencies += "io.grafeas" % "grafeas" % "1.0.2"
 ```
-[//]: # ({x-version-update-end})
 
 ## Authentication