Adds fine-grained control to GitHub action labeler (#3436)

Previous merge led to matches for documentation that are unintentional.
This MR fixes the workflow.

- Bug fix (non-breaking change which fixes an issue)

- [x] I have read and understood the [contribution
guidelines](https://isaac-sim.github.io/IsaacLab/main/source/refs/contributing.html)
- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

---------
Signed-off-by: Mayank Mittal <12863862+Mayankm96@users.noreply.github.com>

.github/labeler.yml

@@ -5,12 +5,12 @@
 
 # Documentation-related changes
 documentation:
+  - all:
     - changed-files:
       - any-glob-to-any-file:
         - 'docs/**'
         - '**/README.md'
       - all-globs-to-all-files:
-      - '!**/CHANGELOG.rst'
         - '!docs/licenses/**'      
 
 # Infrastructure changes
@@ -55,6 +55,7 @@ isaac-mimic:
 
 # Isaac Lab team related changes.
 isaac-lab:
+  - all:
     - changed-files:
       - any-glob-to-any-file:
         - source/**
@@ -62,6 +63,7 @@ isaac-lab:
       - all-globs-to-all-files:
         - '!source/isaaclab_assets/**'
         - '!source/isaaclab_mimic/**'
+        - '!source/isaaclab/isaaclab/devices'
         - '!scripts/imitation_learning/**'
 
 # Add 'enhancement' label to any PR where the head branch name