Merge pull request rapid7#20150 from adfoster-r7/remove-end-of-life-ubuntu-gh-action

Remove end of life ubuntu gh action

Author: adfoster-r7

.github/workflows/shared_gem_verify.yml

@@ -26,7 +26,6 @@ jobs:
           - '3.3'
           - '3.4'
         os:
-          - ubuntu-20.04
           - ubuntu-22.04
           - ubuntu-24.04
           - ubuntu-latest