chore: regenerate README (#333)

This PR was generated using Autosynth. 🌈


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

```
2020-10-23 18:04:37,218 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-speech/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-10-23 18:04:38,354 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/60ed841a-0d0d-4557-9761-5c0ecb58109d/targets

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

Author: yoshi-automation

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

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-speech.git",
-        "sha": "7c2227de256fb9090dc1a8e212fc808275c0a781"
+        "sha": "ff2a18aabdb59ba580a90a83883e6b7ef15213de"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "901ddd44e9ef7887ee681b9183bbdea99437fdcc"
+        "sha": "721a7d2abb129029eca9d85a40da6eb7b8b1739a"
       }
     }
   ]

README.md

@@ -17,7 +17,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>13.1.0</version>
+      <version>13.2.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>