pin gha versions (#1566)

.github/workflows/docs.yml

@@ -18,7 +18,7 @@ jobs:
         run:  rustup show
 
       - name: Rust cache
-        uses: Swatinem/rust-cache@v1
+        uses: Swatinem/rust-cache@6720f05bc48b77f96918929a9019fb2203ff71f8 # v2.0.0
 
       - name: Build rustdocs
         run:  SKIP_WASM_BUILD=1 cargo doc --all --no-deps
@@ -27,7 +27,7 @@ jobs:
         run:  echo "<meta http-equiv=refresh content=0;url=cumulus_client_collator/index.html>" > ./target/doc/index.html
 
       - name: Deploy documentation
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@068dc23d9710f1ba62e86896f84735d869951305 # v3.8.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_branch: gh-pages

.github/workflows/release-30_create-draft.yml

@@ -192,7 +192,7 @@ jobs:
 
       - name: Create draft release
         id: create-release
-        uses: actions/create-release@v1
+        uses: actions/create-release@0cb9c9b65d5d1901c1f53e5e66eaf4afd303e70e # v1.1.4
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
@@ -258,7 +258,7 @@ jobs:
           mv "$(sed -E 's/-(.*)/_\1/' <<< ${{ matrix.runtime }})_runtime.compact.compressed.wasm" "${{ matrix.runtime }}_runtime.compact.compressed.wasm" || true
 
       - name: Upload compressed ${{ matrix.runtime }} wasm
-        uses: actions/upload-release-asset@v1
+        uses: actions/upload-release-asset@e8f9f06c4b078e705bd2ea027f0926603fc9b4d5 # v1.0.2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with: