fix: pin GitHub Actions to SHA hashes

Task: DX-1985

Author: koralkulacoglu

.github/workflows/ci.yml

@@ -26,12 +26,12 @@ jobs:
           ref: ${{ github.event.pull_request.head.sha }}
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@v1
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # v1
         with:
           toolchain: nightly
 
       - name: Cache Rust dependencies
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
         with:
           workspaces: "packages/wasm-miniscript"
           cache-on-failure: true

.github/workflows/publish.yml

@@ -25,7 +25,7 @@ jobs:
           node-version: 18
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@v1
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # v1
         with:
           toolchain: nightly