workflow: update golang version to 1.19

Upgrade golang to 1.19.3, and delete matrix, since this repo
doesn't need so many checks.

Signed-off-by: bin liu <bin@hyper.sh>

.github/workflows/main.yml

@@ -2,11 +2,7 @@ on: ["pull_request"]
 name: Static checks
 jobs:
   test:
-    strategy:
-      matrix:
-        go-version: [1.13.x, 1.14.x, 1.15.x]
-        os: [ubuntu-18.04]
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     env:
       GO111MODULE: off
       TRAVIS: "true"
@@ -17,7 +13,7 @@ jobs:
     - name: Install Go
       uses: actions/setup-go@v2
       with:
-        go-version: ${{ matrix.go-version }}
+        go-version: 1.19.3
     - name: Setup GOPATH
       run: |
         gopath_org=$(go env GOPATH)/src/github.com/kata-containers/