chore: add mirror node team to a dir in codeowners

[PavelSBorisov]

Description:
Add the @hashgraph/mirror-node team to the CODEOWNERS file, line below:
/hapi/hedera-protobufs/services

Related issue(s):

Fixes #17025

Notes for reviewer:
N/A

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.09%. Comparing base (e20b66a) to head (8f35177).

Additional details and impacted files

@@            Coverage Diff             @@
##             develop   #17053   +/-   ##
==========================================
  Coverage      64.09%   64.09%           
  Complexity     20729    20729           
==========================================
  Files           2543     2543           
  Lines          95458    95458           
  Branches        9993     9993           
==========================================
  Hits           61187    61187           
  Misses         30664    30664           
  Partials        3607     3607           

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: -1.00%)	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (e20b66a)	98223	64603	65.77%
Head commit (8f35177)	98223 (+0)	64603 (+0)	65.77% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#17053)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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