fix: Report warning on .github/workflows/ci.yaml

* fix: Report warning on `.github/workflows/ci.yaml`

Not all files in `.github/workflows` are managed, only `ci.yaml`.

Related false-positive: googleapis/repo-automation-bots#1952 (comment)

* fix: Report warning on `.github/workflows/ci.yaml`

Not all files in `.github/workflows` are managed, only `ci.yaml`.

Source-Author: Daniel Bankhead <danielbankhead@google.com>
Source-Date: Mon Jun 7 11:30:30 2021 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 2430f8d90ed8a508e8422a3a7191e656d5a6bf53
Source-Link: googleapis/synthtool@2430f8d

.github/generated-files-bot.yml

@@ -3,8 +3,8 @@ generatedFiles:
   message: '`.kokoro` files are templated and should be updated in [`synthtool`](https://github.com/googleapis/synthtool)'
 - path: '.github/CODEOWNERS'
   message: 'CODEOWNERS should instead be modified via the `codeowner_team` property in .repo-metadata.json'
-- path: '.github/workflows/**'
-  message: '`.github/workflows` (GitHub Actions) should be updated in [`synthtool`](https://github.com/googleapis/synthtool)'
+- path: '.github/workflows/ci.yaml'
+  message: '`.github/workflows/ci.yaml` (GitHub Actions) should be updated in [`synthtool`](https://github.com/googleapis/synthtool)'
 - path: '.github/generated-files-bot.+(yml|yaml)'
   message: '`.github/generated-files-bot.(yml|yaml)` should be updated in [`synthtool`](https://github.com/googleapis/synthtool)'
 - path: 'README.md'

synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-firestore.git",
-        "sha": "c4096affaa69017ff1515d02631fd68614605528"
+        "sha": "cd7e35c5e47f709399bd64d5620004ce9f494b0d"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "7332178a11ddddc91188dc0f25bca1ccadcaa6c6"
+        "sha": "2430f8d90ed8a508e8422a3a7191e656d5a6bf53"
       }
     }
   ],