Remove golang 1.20 from test pipeline

Author: RincewindsHat

.github/workflows/go.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        go: [ '1.20', '1.21', '1.23' ]
+        go: [ '1.21', '1.23' ]
 
     steps:
       - name: Set up Go ${{ matrix.go }}