ci: pin tj-actions/changed-files v46.0.1 SHA

Author: nschonni

.github/workflows/build-test.yml

@@ -26,7 +26,7 @@ jobs:
 
       - name: Calculate file differences
         id: diff
-        uses: tj-actions/changed-files@v45
+        uses: tj-actions/changed-files@2f7c5bfce28377bc069a65ba478de0a74aa0ca32 # v46.0.1
         with:
           json: true
           escape_json: false