Patch release updates

[tsaarni]

This PR updates the main branch with information for the patch releases v1.30.1, v1.29.3 and v1.28.7, along with an Envoy version bump in main.

Unlike before, I’ve linked the Envoy changelog index pages that contain the changelogs for each minor version. This is because we may skip certain Envoy releases, as in this case, so readers will need to refer to multiple changelogs anyway. Additionally, it may help reduce the effort required to update the links.

Related PRs

• main: https://github.com/projectcontour/contour/pull/6714
• https://github.com/projectcontour/contour/pull/6715
• https://github.com/projectcontour/contour/pull/6716
• https://github.com/projectcontour/contour/pull/6717

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Please upload report for BASE (main@5b0d091). Learn more about missing BASE report. Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6724   +/-   ##
=======================================
  Coverage        ?   81.04%           
=======================================
  Files           ?      133           
  Lines           ?    20001           
  Branches        ?        0           
=======================================
  Hits            ?    16210           
  Misses          ?     3498           
  Partials        ?      293