chore: regenerate README (#169)

This PR was generated using Autosynth. 🌈


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

```
2020-11-19 17:43:56,958 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-mediatranslation/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-11-19 17:43:57,841 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/4cfa0790-9774-40b0-8b98-a1c9f2b029fd/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-mediatranslation.git",
-        "sha": "4174824b9a05532698abac1eacb4cb281e0a40c2"
+        "sha": "f959b68a5d0232d6ce42159811cbcbc1a473544e"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "d5fc0bcf9ea9789c5b0e3154a9e3b29e5cea6116"
+        "sha": "a073c873f3928c561bdf87fdfbf1d081d1998984"
       }
     }
   ]

README.md

@@ -20,7 +20,7 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-mediatranslation</artifactId>
-  <version>0.2.4</version>
+  <version>0.2.6</version>
 </dependency>
 
 ```