reconfigure mergify

[Borda]

What does this PR do?

Resowing following problems:

• label conflict seems not to remove the label after resolving conflict
• the update seems to be failing with forked PRs Continue even if some PRs fails chinthakagodawita/autoupdate#100
• update as it GHA does not trigger consecutive GHA tests (which is a known issue)

Some concerns:

• the only question is how the update works here if it requires also resolve conflicts, which is not well described in docs

discussed with @SeanNaren

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[Borda]

yeah, I have resolved conflicts so atm the label shall be removed, hut it is till there... :/

[codecov]

Codecov Report

Merging #5499 (6a9c620) into master (71d5cc1) will decrease coverage by 0%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #5499    +/-   ##
=======================================
- Coverage      93%     93%    -0%     
=======================================
  Files         135     135            
  Lines       10006    9866   -140     
=======================================
- Hits         9329    9176   -153     
- Misses        677     690    +13