ci: upgrade actions, lock redis version

.github/workflows/build.yml

@@ -11,16 +11,17 @@ jobs:
     runs-on: ${{ matrix.os }}
     services:
       redis:
-        image: redis
+        image: redis:7
         ports:
           - 6379:6379
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
           go-version: ${{ matrix.go-version }}
+          cache: false
 
       - name: Build core module
         run: go build -v ./...
@@ -44,20 +45,21 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        go-version: [1.18.x]
+        go-version: [1.20.x, 1.21.x]
     runs-on: ${{ matrix.os }}
     services:
       redis:
-        image: redis
+        image: redis:7
         ports:
           - 6379:6379
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
           go-version: ${{ matrix.go-version }}
+          cache: false
 
       - name: Build tools module
         run: cd tools && go build -v ./... && cd ..