Fix sha256 on gradle 7.6.1

[jmazanec15]

Description

Fixes checksum for gradle 7.6.1

Related: https://github.com/opensearch-project/k-NN/actions/runs/4931642285/jobs/8813885647

Checksums can be found here.

Command to generate:

./gradlew wrapper --gradle-version 7.6.1 --gradle-distribution-sha256-sum 518a863631feb7452b8f1b3dc2aaee5f388355cc3421bbd0275fbeadd77e84b2 --distribution-type all

Check List

• Commits are signed as per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[jmazanec15]

Secure tests failures are unrelated.

[codecov-commenter]

Codecov Report

Merging #900 (1f276e7) into main (fd4b9f1) will decrease coverage by 0.32%.
The diff coverage is 100.00%.

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@@             Coverage Diff              @@
##               main     #900      +/-   ##
============================================
- Coverage     85.35%   85.03%   -0.32%     
+ Complexity     1089     1084       -5     
============================================
  Files           152      152              
  Lines          4404     4404              
  Branches        389      389              
============================================
- Hits           3759     3745      -14     
- Misses          470      482      +12     
- Partials        175      177       +2     

Impacted Files	Coverage Δ
...in/transport/TrainingJobRouterTransportAction.java	80.00% <100.00%> (ø)

... and 3 files with indirect coverage changes

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-2.x 2.x
# Navigate to the new working tree
cd .worktrees/backport-2.x
# Create a new branch
git switch --create backport/backport-900-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 8636cde67cdddb694f48231cacd82d7dfeb93c88
# Push it to GitHub
git push --set-upstream origin backport/backport-900-to-2.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-900-to-2.x.