chore: Update External Providers CI to not run on changes to docs, rfcs, and scripts (#2009)

# What does this PR do?
Update External Providers CI to not run on changes to docs, rfcs, and
scripts

[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## Test Plan
[Describe the tests you ran to verify your changes with result
summaries. *Provide clear instructions so the plan can be easily
re-executed.*]

[//]: # (## Documentation)

---------

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

.github/workflows/test-external-providers.yml

@@ -5,6 +5,14 @@ on:
     branches: [ main ]
   pull_request:
     branches: [ main ]
+    paths:
+      - 'distributions/**'
+      - 'llama_stack/**'
+      - 'tests/integration/**'
+      - 'uv.lock'
+      - 'pyproject.toml'
+      - 'requirements.txt'
+      - '.github/workflows/test-external-providers.yml' # This workflow
 
 jobs:
   test-external-providers: