ci: update actions/cache to v4

Author: richardeoin

.github/workflows/ci.yml

@@ -38,14 +38,14 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Cache cargo registry and index
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry
             ~/.cargo/git
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
       - name: Cache cargo build
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: target
           key: ${{ runner.os }}-target-${{ matrix.rust }}-${{ hashFiles('**/Cargo.toml') }}-memory-${{ hashFiles('**/memory.x') }}

.github/workflows/nightly.yml

@@ -24,14 +24,14 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Cache cargo registry and index
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry
             ~/.cargo/git
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
       - name: Cache cargo build
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: target
           key: ${{ runner.os }}-target-nightly-${{ hashFiles('**/Cargo.toml') }}-memory-${{ hashFiles('**/memory.x') }}