update go matrix to include go.12 as I don't know what customers are using

Author: btipling

.github/workflows/ci.yaml

@@ -18,7 +18,7 @@ jobs:
   go-test:
     strategy:
       matrix:
-        go-version: [1.24.x]
+        go-version: [1.22.x, 1.24.x]
         platform: [ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     steps: