chore(deps): Update actions/cache action to v5

Author: cq-bot

.github/workflows/gen_coverage_report.yml

@@ -28,7 +28,7 @@ jobs:
           go-version: "1.25"
           cache: false
       - name: Cache Go modules
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/go/pkg/mod

.github/workflows/go_mod_tidy_examples.yml

@@ -27,7 +27,7 @@ jobs:
           go-version-file: go.mod
           cache: false
       - name: Cache Go modules
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/go/pkg/mod

.github/workflows/lint_golang.yml

@@ -23,7 +23,7 @@ jobs:
           go-version-file: go.mod
           cache: false
       - name: Cache Go modules
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/go/pkg/mod

.github/workflows/unittest.yml

@@ -33,7 +33,7 @@ jobs:
           echo "gocache=$(go env GOCACHE)" >> "$GITHUB_OUTPUT"
           echo "gomodcache=$(go env GOMODCACHE)" >> "$GITHUB_OUTPUT"
       - name: Cache Go modules
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ${{ steps.go-cache.outputs.gomodcache }}