Pin dependencies (#29946)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/build_develop.yml

@@ -26,9 +26,9 @@ jobs:
             R2_URL: ${{ vars.CF_R2_S3_API }}
             R2_PUBLIC_URL: "https://element-web-develop.element.io"
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
               with:
                   cache: "yarn"
                   node-version: "lts/*"
@@ -53,7 +53,7 @@ jobs:
 
             - run: mv dist/element-*.tar.gz dist/develop.tar.gz
 
-            - uses: actions/upload-artifact@v4
+            - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
               with:
                   name: webapp
                   path: dist/develop.tar.gz