Add release date for v3.4.36 and v3.6.0-rc.1

[jmhbnz]

Both releases were published successfully during today's release meeting.

cc @ivanvc, @ahrtr

[jmhbnz]

I've added this placeholder but we can just delete it if we decide to publish v3.6.0 without an rc2 release.

[ahrtr]

We need rc.2 because we need to backport #19452

[ahrtr]

Let's target rc.2 next week.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.84%. Comparing base (66748c0) to head (99683d5).
Report is 3 commits behind head on main.

Additional details and impacted files

see 20 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #19484      +/-   ##
==========================================
+ Coverage   68.82%   68.84%   +0.02%     
==========================================
  Files         420      420              
  Lines       35762    35779      +17     
==========================================
+ Hits        24613    24632      +19     
+ Misses       9719     9717       -2     
  Partials     1430     1430              

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[ivanvc]

LGTM. Thanks, James.

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