feat: add gcf-owl-bot[bot] to ignoreAuthors

* feat: add `gcf-owl-bot[bot]` to `ignoreAuthors`

Related: googleapis/repo-automation-bots#1751

* feat: add `yoshi-automation` to `ignoreAuthors`

Source-Author: Daniel Bankhead <danielbankhead@google.com>
Source-Date: Tue May 18 15:08:47 2021 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 7332178a11ddddc91188dc0f25bca1ccadcaa6c6
Source-Link: googleapis/synthtool@7332178

.github/generated-files-bot.yml

@@ -9,3 +9,4 @@ ignoreAuthors:
 - 'renovate-bot'
 - 'yoshi-automation'
 - 'release-please[bot]'
+- 'gcf-owl-bot[bot]'

synth.metadata

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/google-api-java-client.git",
-        "sha": "bfb871a1c1ddb23d2362223140824f1501fdbd88"
+        "sha": "62b8d3973a787ff88e410e2b0cdccf7ab1b5500e"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "c86c7a60985644eab557949363a38301d40d78d2"
+        "sha": "7332178a11ddddc91188dc0f25bca1ccadcaa6c6"
       }
     }
   ],