[Backport 2.x] Fix typo in release notes

[opensearch-trigger-bot[bot]]

Backport 7d6206e18af3d102845f7358c6c74016475ebada from #573

[codecov[bot]]

Codecov Report

Merging #574 (00b99fd) into 2.x (0f2c9d7) will decrease coverage by 0.17%. The diff coverage is n/a.

:exclamation: Current head 00b99fd differs from pull request most recent head 915218c. Consider uploading reports for the commit 915218c to get more accurate results

@@             Coverage Diff              @@
##                2.x     #574      +/-   ##
============================================
- Coverage     68.58%   68.42%   -0.17%     
+ Complexity      365      364       -1     
============================================
  Files            44       44              
  Lines          2480     2480              
  Branches        172      172              
============================================
- Hits           1701     1697       -4     
- Misses          676      679       +3     
- Partials        103      104       +1     

see 1 file with indirect coverage changes