bump go on github actions

Author: greggman

.github/workflows/build.yml

@@ -56,7 +56,7 @@ jobs:
       - name: Use Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.21.3'
+          go-version: '1.26.x'
 
       - name: Print env
         run: |