get go version for setup-go from go.mod

Author: dgrove-oss

Diff for: .github/workflows/verify_generated_files.yml

@@ -22,6 +22,6 @@ jobs:
     - name: Set Go
       uses: actions/setup-go@v5
       with:
-        go-version: v1.21
+        go-version-file: './go.mod'
     - name: Verify that imports are organized
       run: make verify-imports

Diff for: .github/workflows/verify_unit_test.yml

@@ -16,9 +16,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v5
       with:
-        go-version: v1.21
-        
-        
+        go-version-file: './go.mod'
 
     - name: Run unit tests
       run: go test ./support/. -v