chore: regenerate README (#475)

This PR was generated using Autosynth. 🌈


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

```
2021-04-30 18:21:49,270 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-resourcemanager/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-04-30 18:21:50,380 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/c8e2bb51-5e31-469d-8ebd-df2deba9c378/targets

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

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-resourcemanager.git",
-        "sha": "5188313a98f4cec39cdeab2f44bb32fc851ab5ef"
+        "sha": "14989aee674a43637fcc37cb6e94967883bff055"
       }
     },
     {

README.md

@@ -41,7 +41,7 @@ If you are using Maven without BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-resourcemanager</artifactId>
-  <version>0.119.2-alpha</version>
+  <version>0.119.3-alpha</version>
 </dependency>
 
 ```