Update go.yml

Author: lchudinov

.github/workflows/go.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        go: [ '1.16', '1.15' ]
+        go: [ '1.13' ]
         os: [ubuntu-latest, macos-latest, windows-latest]
     name: Open Web Launch ${{ matrix.go }}-${{ matrix.os }} 
     steps: