chore: regenerate README (#368)

This PR was generated using Autosynth. 🌈


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

```
2021-01-07 22:21:52,701 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-datalabeling/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-01-07 22:21:53,606 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/3caf27a4-ec7f-41b7-9d1a-2aed783046b5/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-datalabeling.git",
-        "sha": "f8733850ad787f012250181ead41d2731233aff2"
+        "sha": "98385aa0662603dce3e157e03de36cf547b547d1"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "41a4e56982620d3edcf110d76f4fcdfdec471ac8"
+        "sha": "67f09bf301083798e7220137723222eb00b8f88a"
       }
     }
   ]

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-datalabeling</artifactId>
-  <version>0.119.7</version>
+  <version>0.119.9</version>
 </dependency>
 
 ```