[Github] Switch pr-code-lint.yml to tj-actions/changed-files

Similar to llvm#158335. pr-code-lint.yml was in progress as a PR when that
change landed, so this workflow did not get updated.

Author: boomanaiden154

.github/workflows/pr-code-lint.yml

@@ -33,7 +33,7 @@ jobs:
 
       - name: Get changed files
         id: changed-files
-        uses: step-security/changed-files@3dbe17c78367e7d60f00d78ae6781a35be47b4a1 # v45.0.1
+        uses: tj-actions/changed-files@ed68ef82c095e0d48ec87eccea555d944a631a4c # v46.0.5
         with:
           separator: ","
           skip_initial_fetch: true