update cache action image

Author: DanielJonesEB

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
         run: cargo check --locked
 
       - name: Cache cargo registry
-        uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4.0.0
+        uses: actions/cache@v4
         with:
           path: |
             $CARGO_HOME/registry/index/
@@ -54,7 +54,7 @@ jobs:
             ${{ runner.os }}-cargo-registry-
 
       - name: Cache cargo build
-        uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4.0.0
+        uses: actions/cache@v4
         with:
           path: target/
           key: ${{ runner.os }}-cargo-build-${{ hashFiles('**/Cargo.lock') }}

.github/workflows/release.yml

@@ -45,7 +45,7 @@ jobs:
         run: cargo check --locked --target ${{ matrix.target }}
 
       - name: Cache cargo registry
-        uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # v4.0.0
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry/index/