Tags in tj-actions/changed-files are compromised (#3290)

The tags in tj-actions/changed-files action are compromised and are
leaking GitHub secrets in repos using the compromised repo. This pins
the action to a known good hash.

https://www.stepsecurity.io/blog/harden-runner-detection-tj-actions-changed-files-action-is-compromised

Signed-off-by: Thanh Ha <[email protected]>

Author: zxiiro

.github/workflows/link_checkPR.yml

@@ -18,7 +18,7 @@ jobs:
 
       - name: Get Changed Files
         id: changed-files
-        uses: tj-actions/changed-files@v41
+        uses: tj-actions/changed-files@d6e91a2266cdb9d62096cebf1e8546899c6aa18f # v45.0.6
 
       - name: Check for Skip Label
         id: skip-label