go.yml: test on go1.21

Signed-off-by: Vincent Batts <[email protected]>

Author: vbatts

.github/workflows/go.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: ['1.17', '1.18', '1.19', '1.20']
+        go: ['1.17', '1.18', '1.19', '1.20', '1.21']
 
     name: Documentation and Linting
     steps: