chore: regenerate README (#279)

This PR was generated using Autosynth. 🌈


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

```
2020-10-22 16:17:18,616 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-tasks/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-10-22 16:17:19,542 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

```
</details>

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https://source.cloud.google.com/results/invocations/0962999f-3f05-4bee-a21d-0f4e78bb25ea/targets

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Author: yoshi-automation

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

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-tasks.git",
-        "sha": "c66c28555c3efdb3338580331a39ea114c1de83e"
+        "sha": "40361638a9b627946b87da453b6f1f79bbe72af5"
       }
     },
     {

README.md

@@ -45,11 +45,11 @@ If you are using Maven without BOM, add this to your dependencies:
 
 If you are using Gradle, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-tasks:1.30.5'
+compile 'com.google.cloud:google-cloud-tasks:1.30.6'
 ```
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-tasks" % "1.30.5"
+libraryDependencies += "com.google.cloud" % "google-cloud-tasks" % "1.30.6"
 ```
 
 ## Authentication