[AUTO] Increment version to 2.8.1-SNAPSHOT

[opensearch-trigger-bot]

• Incremented version to 2.8.1-SNAPSHOT.

[codecov]

Codecov Report

Merging #480 (0121ebb) into 2.8 (89eeaa4) will decrease coverage by 0.25%.
The diff coverage is n/a.

❗ Current head 0121ebb differs from pull request most recent head 77c78f0. Consider uploading reports for the commit 77c78f0 to get more accurate results

@@             Coverage Diff              @@
##                2.8     #480      +/-   ##
============================================
- Coverage     73.75%   73.51%   -0.25%     
+ Complexity      376      374       -2     
============================================
  Files            44       44              
  Lines          2477     2477              
  Branches        172      172              
============================================
- Hits           1827     1821       -6     
- Misses          542      547       +5     
- Partials        108      109       +1     

see 2 files with indirect coverage changes