add GOBIN to CI

Author: kevinschaul

.github/workflows/ci.yml

@@ -70,6 +70,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     env:
       GOPATH: ${{ github.workspace }}
+      GOBIN: ${{ github.workspace }}/bin
 
     if: ${{ github.event_name == 'push' || github.event_name == 'pull_request' }}