Add release notes of 1.9.2 (#7934)

[lunny]

Back port from #7934

Add release notes of 1.9.2

[jolheiser]

CI failure seems unrelated, just needs a restart.

[codecov-io]

Codecov Report

Merging #7939 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #7939      +/-   ##
==========================================
+ Coverage   41.45%   41.47%   +0.01%     
==========================================
  Files         478      478              
  Lines       63966    63966              
==========================================
+ Hits        26520    26532      +12     
+ Misses      33991    33980      -11     
+ Partials     3455     3454       -1

Impacted Files	Coverage Δ
models/repo_list.go	73.09% <0%> (+1.01%)	⬆️
modules/log/event.go	65.64% <0%> (+1.02%)	⬆️
modules/process/manager.go	81.15% <0%> (+4.34%)	⬆️
models/unit.go	67.56% <0%> (+5.4%)	⬆️
modules/sync/unique_queue.go	89.28% <0%> (+10.71%)	⬆️

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