[AUTO] Increment version to 2.12.0-SNAPSHOT

[opensearch-trigger-bot]

• Incremented version to 2.12.0-SNAPSHOT.

[Hailong-am]

depends on opensearch-project/common-utils#545

[codecov]

Codecov Report

Merging #780 (3b2661d) into 2.x (5215bbd) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##                2.x     #780   +/-   ##
=========================================
  Coverage     66.45%   66.45%           
  Complexity      263      263           
=========================================
  Files            39       39           
  Lines          1717     1717           
  Branches        165      165           
=========================================
  Hits           1141     1141           
  Misses          453      453           
  Partials        123      123           

Flag	Coverage Δ
opensearch-notifications	66.45% <ø> (ø)

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