chore(deps): Update helm release postgresql to v12.6.7

[renovate]

This PR contains the following updates:

Package	Update	Change
postgresql (source)	patch	12.6.0 -> 12.6.7

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[codecov]

Codecov Report

Merging #1681 (7aca94c) into main (5dce9a9) will increase coverage by 0.19%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1681      +/-   ##
==========================================
+ Coverage   52.95%   53.15%   +0.19%     
==========================================
  Files         133      133              
  Lines       15710    15710              
==========================================
+ Hits         8320     8351      +31     
+ Misses       6662     6631      -31     
  Partials      728      728              

see 4 files with indirect coverage changes

[oguzhand95]

#1677

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[charithe]

If the problem is now fixed, we could just get rid of the version field and let Helm always pick the latest version like before.

[oguzhand95]

I tried to run e2e tests on my local, and the new version of the bitnami/postgresql doesn't cause any problems like 12.6.1, 12.6.2 and 12.6.3.