v7.22.0-rc.2

Changelog

• fa666c5 Bump Pelican version to 7.22.0-rc.2
• 23e0c29 Images: Pin xrdhttp-pelican to a specific version
• 87aa2a1 Images: bump xrdhttp-pelican version and release to 0.0.8-1
• ce73ae8 Update classads library