[Backport 2.x] Add Peter Nied as a Maintainer

[opensearch-trigger-bot]

Backport 7a22587 from #9765.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/24464/
• CommitID: 6be988f

[codecov]

Codecov Report

Merging #9768 (6be988f) into 2.x (b3b1091) will decrease coverage by 0.02%.
Report is 4 commits behind head on 2.x.
The diff coverage is 82.90%.

@@             Coverage Diff              @@
##                2.x    #9768      +/-   ##
============================================
- Coverage     70.78%   70.77%   -0.02%     
+ Complexity    58006    57995      -11     
============================================
  Files          4802     4805       +3     
  Lines        274034   274423     +389     
  Branches      40315    40337      +22     
============================================
+ Hits         193984   194222     +238     
- Misses        63435    63520      +85     
- Partials      16615    16681      +66     

Files Changed	Coverage Δ
...testore/stats/TransportRemoteStoreStatsAction.java	41.02% <0.00%> (-3.42%)	⬇️
...arch/index/remote/RemoteStorePressureSettings.java	87.09% <ø> (ø)
...ain/java/org/opensearch/indices/IndicesModule.java	98.23% <ø> (-0.02%)	⬇️
...in/java/org/opensearch/index/shard/IndexShard.java	68.00% <25.00%> (-1.08%)	⬇️
...main/java/org/opensearch/search/SearchService.java	71.80% <60.00%> (-0.79%)	⬇️
...rg/opensearch/index/translog/RemoteFsTranslog.java	69.03% <75.86%> (-2.17%)	⬇️
...in/java/org/opensearch/index/ReplicationStats.java	77.41% <77.41%> (ø)
...ch/index/remote/RemoteTranslogTransferTracker.java	79.51% <79.51%> (ø)
...search/index/shard/RemoteStoreRefreshListener.java	86.26% <80.00%> (-1.65%)	⬇️
...dex/translog/transfer/TranslogTransferManager.java	72.22% <81.13%> (-4.74%)	⬇️
... and 13 more

... and 447 files with indirect coverage changes