use go 1.22 now (#160)

Signed-off-by: Bob Callaway <[email protected]>

Author: bobcallaway

.github/workflows/test-action.yml

@@ -206,8 +206,8 @@ jobs:
           - ubuntu-latest
           - windows-latest
         go_version:
-          - '1.20'
           - '1.21'
+          - '1.22'
     name: Try to install cosign with go ${{ matrix.go_version }}
     steps:
       - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2