Add mahadzaryab1 to maintainers

[yurishkuro]

Which problem is this PR solving?

• Resolves Promote mahadzaryab1 to Maintainer #6264

Description of the changes

• Add new maintainer
• Clean-up README

[mahadzaryab1]

thank you so much!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.14%. Comparing base (56c09d3) to head (adb5288).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6323      +/-   ##
==========================================
+ Coverage   96.11%   96.14%   +0.02%     
==========================================
  Files         356      356              
  Lines       20476    20476              
==========================================
+ Hits        19681    19686       +5     
+ Misses        607      603       -4     
+ Partials      188      187       -1     

Flag	Coverage Δ
badger_v1	8.83% <ø> (ø)
badger_v2	1.62% <ø> (ø)
cassandra-4.x-v1-manual	14.73% <ø> (ø)
cassandra-4.x-v2-auto	1.56% <ø> (ø)
cassandra-4.x-v2-manual	1.56% <ø> (ø)
cassandra-5.x-v1-manual	14.73% <ø> (ø)
cassandra-5.x-v2-auto	1.56% <ø> (ø)
cassandra-5.x-v2-manual	1.56% <ø> (ø)
elasticsearch-6.x-v1	18.46% <ø> (-0.01%)	⬇️
elasticsearch-7.x-v1	18.54% <ø> (-0.01%)	⬇️
elasticsearch-8.x-v1	18.71% <ø> (ø)
elasticsearch-8.x-v2	1.61% <ø> (ø)
grpc_v1	10.28% <ø> (-0.01%)	⬇️
grpc_v2	7.85% <ø> (+<0.01%)	⬆️
kafka-v1	8.52% <ø> (ø)
kafka-v2	1.62% <ø> (ø)
memory_v2	1.62% <ø> (ø)
opensearch-1.x-v1	18.60% <ø> (ø)
opensearch-2.x-v1	18.60% <ø> (ø)
opensearch-2.x-v2	1.62% <ø> (ø)
tailsampling-processor	0.45% <ø> (ø)
unittests	95.05% <ø> (+0.02%)	⬆️

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