Add 22.04 as well

Author: Porges

.github/workflows/ci.yml

@@ -29,6 +29,7 @@ jobs:
         - [ self-hosted, "1ES.Pool=onefuzz-ci", "1ES.ImageOverride=github-runner-image-windows-2019" ]
         - [ self-hosted, "1ES.Pool=onefuzz-ci", "1ES.ImageOverride=github-runner-image-ubuntu-18.04" ] 
         - [ self-hosted, "1ES.Pool=onefuzz-ci", "1ES.ImageOverride=github-runner-image-ubuntu-20.04" ] 
+        - [ self-hosted, "1ES.Pool=onefuzz-ci", "1ES.ImageOverride=github-runner-image-ubuntu-22.04" ] 
     runs-on: "${{ matrix.os }}"
     steps:
     - uses: actions/checkout@v2