[ci] Skip Cozystack tests on PRs that only change the docs (#1136)

- Skip long workflows on PRs that only change files inside the `./docs`
directory.
- Not applicable to other docs in this repository, such as
`packages/apps/**/*.md`, as they're part of the build.



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## What this PR does


### Release note

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```release-note
[ci] Skip Cozystack tests on PRs that only change the docs
```

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Chores**
* Updated automated workflows to skip running on pull requests that only
modify documentation files, reducing unnecessary workflow runs.
* Refined workflow triggers to exclude events triggered by labeling pull
requests, streamlining automation processes.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/pre-commit.yml

@@ -2,7 +2,7 @@ name: Pre-Commit Checks
 
 on:
   pull_request:
-    types: [labeled, opened, synchronize, reopened]
+    types: [opened, synchronize, reopened]
 
 concurrency:
   group: pre-commit-${{ github.workflow }}-${{ github.event.pull_request.number }}

.github/workflows/pull-requests-release.yaml

@@ -3,6 +3,8 @@ name: "Releasing PR"
 on:
   pull_request:
     types: [closed]
+    paths-ignore:
+      - 'docs/**/*'
 
 # Cancel in‑flight runs for the same PR when a new push arrives.
 concurrency:

.github/workflows/pull-requests.yaml

@@ -2,7 +2,9 @@ name: Pull Request
 
 on:
   pull_request:
-    types: [labeled, opened, synchronize, reopened]
+    types: [opened, synchronize, reopened]
+    paths-ignore:
+      - 'docs/**/*'
 
 # Cancel in‑flight runs for the same PR when a new push arrives.
 concurrency: