Release v0.12.9

What's Changed

• Update stable release to v0.12.8 by @michi-covalent in #1226
• sysdump: collect CiliumEgressGatewayPolicies by @julianwiedmann in #1227
• connectivity: add --collect-sysdump-on-failure flag by @jibi in #1228
• Prepare for v0.12.9 release by @jibi in #1230

New Contributors

• @julianwiedmann made their first contribution in #1227

Full Changelog: v0.12.8...v0.12.9