Update GHA deps.

.github/workflows/on-pull-request.yaml

@@ -16,23 +16,23 @@ jobs:
     strategy:
       matrix:
         go-version:
-          - 1.18.x
-          - 1.19.x
+          - 1.21.x
+          - 1.22.x
         os: [ ubuntu-latest ]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go-version }}
 
       - run: go env
 
       - name: Cache deps
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/go/pkg/mod
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -43,4 +43,4 @@ jobs:
         run: go mod download
 
       - name: Test
-        run: go test ./...
+        run: go test ./...