Upgrade actions/cache to from ver. 3 to 4

Author: ramsafin

.github/workflows/ci.yml

@@ -54,15 +54,15 @@ jobs:
           sudo apt-get -qq install -y clang lld gcc g++ ccache --no-install-recommends
 
       - name: Cache ccache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ github.workspace }}/.ccache
-          key: ${{ runner.os }}-ccache-${{ matrix.compiler }}-${{ matrix.build_type }}-${{ hashFiles('CMakeLists.txt') }}
+          key: ${{ runner.os }}-ccache-${{ matrix.compiler }}-${{ matrix.build_type }}
           restore-keys: |
             ${{ runner.os }}-ccache-
 
       - name: Cache build directory
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: build/
           key: ${{ runner.os }}-build-${{ matrix.compiler }}-${{ matrix.build_type }}-${{ github.sha }}

.github/workflows/clang-format.yml

@@ -46,7 +46,7 @@ jobs:
 
       - name: Cache build artifacts
         id: cache-build
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: build/
           key: ${{ runner.os }}-build-${{ github.sha }}

.github/workflows/clang-tidy.yml

@@ -44,7 +44,7 @@ jobs:
 
       - name: Cache build artifacts
         id: cache-build
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: build/
           key: ${{ runner.os }}-build-${{ github.sha }}

.github/workflows/coverage.yml

@@ -36,18 +36,18 @@ jobs:
           sudo apt install -y gcc g++ ccache gcovr lcov
 
       - name: Cache ccache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: $CACHE_DIR
-          key: ${{ runner.os }}-ccache-${{ hashFiles('.github/workflows/coverage.yml') }}
+          key: ${{ runner.os }}-ccache-${{ github.sha }}
           restore-keys: |
             ${{ runner.os }}-ccache-
 
       - name: Cache build directory
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: build/
-          key: ${{ runner.os }}-build--${{ hashFiles('.github/workflows/coverage.yml') }}-${{ github.sha }}
+          key: ${{ runner.os }}-build-${{ github.sha }}
           restore-keys: |
             ${{ runner.os }}-build-