update golang version in github action (#83)

Author: wangrzneu

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Set up go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.19.2
+        go-version: 1.21.9
 
     - name: Build
       run: go build ./...

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Set up go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.19.3
+        go-version: 1.21.9
 
     - name: Build
       run: bash hack/github-release.sh