ci(vale): limit to changed files only

Try to speed things up.

Signed-off-by: Randolph Sapp <rs@ti.com>

Author: StaticRocket

.github/workflows/vale.yml

@@ -12,10 +12,19 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/changed-files@v46
+        with:
+          files: |
+            **.rst
+            **.md
+
       - name: Install docutils
         run: sudo apt-get install -y docutils
 
       - name: Run vale checks
         uses: errata-ai/vale-action@v2.1.1
         with:
           fail_on_error: true
+          files: ${{ steps.changed-files.outputs.all_changed_files }}