Bump actions/cache from 3 to 4

.github/workflows/libfuzzer.yaml

@@ -173,7 +173,7 @@ jobs:
 
     - name: Restore the cached fuzzing corpus (bulk)
       id: restore-corpus-cache-bulk
-      uses: actions/cache/restore@v3
+      uses: actions/cache/restore@v4
       with:
         path: db/corpus-bulk
         key: "${{ steps.config.outputs.cache_prefix }}-bulk"
@@ -182,7 +182,7 @@ jobs:
     # they don't overwrite each other. Now we are going to combine them.
     - name: Restore the cached fuzzing corpus (rowbyrow)
       id: restore-corpus-cache-rowbyrow
-      uses: actions/cache/restore@v3
+      uses: actions/cache/restore@v4
       with:
         path: db/corpus-rowbyrow
         key: "${{ steps.config.outputs.cache_prefix }}-rowbyrow"
@@ -325,7 +325,7 @@ jobs:
 
     - name: Save fuzzer corpus
       if: always()
-      uses: actions/cache/save@v3
+      uses: actions/cache/save@v4
       with:
         path: db/corpus-${{ matrix.case.bulk && 'bulk' || 'rowbyrow' }}
         key: "${{ format('{0}-{1}-{2}-{3}',

.github/workflows/linux-32bit-build-and-test.yaml

@@ -84,7 +84,7 @@ jobs:
     # leading to a tainted cache
     - name: Cache PostgreSQL ${{ matrix.pg }} ${{ matrix.build_type }}
       id: cache-postgresql
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/${{ env.PG_SRC_DIR }}
         key: "linux-32-bit-postgresql-${{ matrix.pg }}-${{ matrix.cc }}\

.github/workflows/linux-build-and-test.yaml

@@ -101,7 +101,7 @@ jobs:
     - name: Cache PostgreSQL ${{ matrix.pg }} ${{ matrix.build_type }}
       id: cache-postgresql
       if: matrix.snapshot != 'snapshot'
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/${{ env.PG_SRC_DIR }}
         key: "${{ matrix.os }}-postgresql-${{ matrix.pg }}-${{ matrix.cc }}\

.github/workflows/sanitizer-build-and-test.yaml

@@ -101,7 +101,7 @@ jobs:
     # leading to a tainted cache
     - name: Cache PostgreSQL ${{ matrix.pg }}
       id: cache-postgresql
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/${{ env.PG_SRC_DIR }}
         key: "${{ matrix.os }}-${{ env.name }}-postgresql-${{ matrix.pg }}-${{ env.CC }}\

.github/workflows/windows-build-and-test.yaml

@@ -115,7 +115,7 @@ jobs:
       # --extract-only and launch our own test instance, which is
       # probably better anyway since it gives us more control.
     - name: Cache PostgreSQL installation
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       id: cache-postgresql
       with:
         path: ~\PostgreSQL\${{ matrix.pg }}