[release/v1.6] bump proxy and ratelimit versions

[rudrakhp]

envoyproxy/envoy:distroless-v1.36.6
envoyproxy/ratelimit:05c08d03

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.04%. Comparing base (6032749) to head (ec42784).
⚠️ Report is 1 commits behind head on release/v1.6.

Additional details and impacted files

@@              Coverage Diff              @@
##           release/v1.6    #8720   +/-   ##
=============================================
  Coverage         73.04%   73.04%           
=============================================
  Files               231      231           
  Lines             34540    34540           
=============================================
  Hits              25231    25231           
  Misses             7466     7466           
  Partials           1843     1843           

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