[AUTO] Increment version to 2.18.0-SNAPSHOT

[opensearch-trigger-bot]

• Incremented version to 2.18.0-SNAPSHOT.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.38%. Comparing base (75f6724) to head (0c41709).
Report is 1 commits behind head on 2.x.

Additional details and impacted files

@@            Coverage Diff             @@
##              2.x    #4711      +/-   ##
==========================================
+ Coverage   65.36%   65.38%   +0.01%     
==========================================
  Files         317      317              
  Lines       22158    22158              
  Branches     3581     3581              
==========================================
+ Hits        14483    14487       +4     
+ Misses       5878     5875       -3     
+ Partials     1797     1796       -1     

see 3 files with indirect coverage changes