chore: regenerate README (#418)

This PR was generated using Autosynth. 🌈 <details><summary>Log from Synthtool</summary> ``` 2021-04-14 00:42:12,634 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-document-ai/.github/readme/synth.py. On branch autosynth-readme nothing to commit, working tree clean 2021-04-14 00:42:13,896 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/467dd57a-1a6c-4d9c-b51f-b17bde81c727/targets - [ ] To automatically regenerate this PR, check this box. (May take up to 24 hours.)

Author: yoshi-automation

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

@@ -4,14 +4,14 @@
  "git": {
  "name": ".",
  "remote": "https://github.com/googleapis/java-document-ai.git",
- "sha": "ddc286a6cdeeff98469243b8dcf2d978f6239095"
+ "sha": "70f45114f95861dc422df6f7e1e998938c784265"
  }
  },
  {
  "git": {
  "name": "synthtool",
  "remote": "https://github.com/googleapis/synthtool.git",
- "sha": "0a071b3460344886297a304253bf924aa68ddb7e"
+ "sha": "082e1ca0863b13ada8594fe91845380765da5b70"
  }
  }
  ]

README.md

@@ -55,12 +55,12 @@ compile 'com.google.cloud:google-cloud-document-ai'
 ```
 If you are using Gradle without BOM, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-document-ai:0.5.0'
+compile 'com.google.cloud:google-cloud-document-ai:0.6.0'
 ```
 
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-document-ai" % "0.5.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-document-ai" % "0.6.0"
 ```
 
 ## Authentication