v0.5.21

What's Changed

• Update GH to use shared workflow by @chris1984 in #186
• Fixes #37204 - Move proxy params to correct location in virt-who.conf by @chris1984 in #189
• Bump version to 0.5.21 by @chris1984 in #190

Full Changelog: v0.5.20...v0.5.21