Bump actions/cache from 3 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
         run: echo "::set-output name=date::$(date +'%Y-%m-%d')"
 
       - name: Cargo registry cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry/index
@@ -41,7 +41,7 @@ jobs:
         run: echo "::set-output name=version::$(cargo search 'cargo-cache' --limit 1 | head -n 1 | cut -d ' ' -f 3 | cut -d '"' -f 2)"
 
       - name: Cargo binaries cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/bin/cargo-cache
@@ -66,7 +66,7 @@ jobs:
         run: echo "::set-output name=version::$(rustc --version | cut -d ' ' -f 2)"
 
       - name: Build cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: target
           key: ${{ runner.os }}-lint-${{ steps.rustcversion.outputs.version }}-${{ hashFiles('**/Cargo.toml') }}
@@ -99,7 +99,7 @@ jobs:
         run: echo "::set-output name=date::$(date +'%Y-%m-%d')"
 
       - name: Cargo registry cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry/index
@@ -119,7 +119,7 @@ jobs:
         run: echo "::set-output name=version::$(rustc --version | cut -d ' ' -f 2)"
 
       - name: Build cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: target
           key: ${{ runner.os }}-test-${{ steps.rustcversion.outputs.version }}-${{ hashFiles('**/Cargo.toml') }}
@@ -204,7 +204,7 @@ jobs:
         run: echo "::set-output name=date::$(date +'%Y-%m-%d')"
 
       - name: Cargo registry cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry/index
@@ -225,7 +225,7 @@ jobs:
         run: echo "::set-output name=version::$(cargo search 'grcov' --limit 1 | head -n 1 | cut -d ' ' -f 3 | cut -d '"' -f 2)"
 
       - name: grcov cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/bin/grcov
@@ -273,7 +273,7 @@ jobs:
         run: echo "::set-output name=date::$(date +'%Y-%m-%d')"
 
       - name: Cargo registry cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry/index