Upgrade minimum Go version to 1.21 and fix Zizmor issues

.github/workflows/dco-check.yml

@@ -8,7 +8,7 @@ jobs:
     steps:
       - name: Check for DCO
         id: dco-check
-        uses: tisonkun/actions-dco@v1.1
+        uses: tisonkun/actions-dco@f1024cd563550b5632e754df11b7d30b73be54a5
       - name: Comment about DCO status
         uses: actions/github-script@v6
         if: ${{ failure() }}
@@ -22,4 +22,4 @@ jobs:
               [contributing guide](https://github.com/databricks/databricks-sql-go/blob/main/CONTRIBUTING.md) \
               every commit message must include a sign-off message. One or more of your commits is missing this message. \
               You can reword previous commit messages with an interactive rebase (\`git rebase -i main\`).`
-            })
+            })

.github/workflows/go.yml

@@ -18,18 +18,18 @@ jobs:
       - name: Set up Go Toolchain
         uses: actions/setup-go@v5
         with:
-          go-version: '1.20.x'
+          go-version: '1.21.x'
           cache: false
 
       - name: Lint
-        uses: golangci/golangci-lint-action@v4
+        uses: golangci/golangci-lint-action@d6238b002a20823d52840fda27e2d4891c5952dc
         with:
           version: 'v1.51'
   build-and-test:
     name: Test and Build
     strategy:
       matrix:
-        go-version: [1.20.x]
+        go-version: [1.21.x]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/databricks/databricks-sql-go
 
-go 1.20
+go 1.21
 
 require (
 	github.com/apache/arrow/go/v12 v12.0.1