Updates demo certs used in integ tests

[DarshitChanpura]

Check List

• Commits are signed 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.

[codecov]

Codecov Report

Merging #756 (c0c4bbd) into main (3c53f69) will increase coverage by 0.07%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main     #756      +/-   ##
============================================
+ Coverage     66.78%   66.85%   +0.07%     
- Complexity      262      263       +1     
============================================
  Files            39       39              
  Lines          1734     1738       +4     
  Branches        165      165              
============================================
+ Hits           1158     1162       +4     
  Misses          453      453              
  Partials        123      123              

Flag	Coverage Δ
opensearch-notifications	66.85% <100.00%> (+0.07%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
...rch/notifications/index/NotificationConfigIndex.kt	70.45% <ø> (ø)
...org/opensearch/notifications/NotificationPlugin.kt	97.67% <100.00%> (+0.23%)	⬆️

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/notifications/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/notifications/backport-2.x
# Create a new branch
git switch --create backport/backport-756-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 f52f799980bb5a9bc8b4765a9c1cb37a9fb42b64
# Push it to GitHub
git push --set-upstream origin backport/backport-756-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/notifications/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-756-to-2.x.