[Github] Switch back to tj-actions/changed-files (#158335)

We were using the step security fork after the tj-actions/changed-files
supply chain attack given Github disabled the repo and all our actions
were failing during that time. Switch away from the fork back to the
main repository to avoid an extra level of indirection until we can
probably just stop using this action/roll our own.

Author: boomanaiden154

.github/workflows/docs.yml

@@ -60,7 +60,7 @@ jobs:
           fetch-depth: 2
       - name: Get subprojects that have doc changes
         id: docs-changed-subprojects
-        uses: step-security/changed-files@3dbe17c78367e7d60f00d78ae6781a35be47b4a1 # v45.0.1
+        uses: tj-actions/changed-files@ed68ef82c095e0d48ec87eccea555d944a631a4c # v46.0.5
         with:
           skip_initial_fetch: true
           base_sha: 'HEAD~1'

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

@@ -25,7 +25,7 @@ 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