refactor: idnits2 mgmt cmds -> tasks

[jennifer-richards]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 78.94737% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 88.85%. Comparing base (187c2c5) to head (8d3ef93).
Report is 119 commits behind head on main.

Files	Patch %	Lines
ietf/doc/tasks.py	78.94%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7421      +/-   ##
==========================================
- Coverage   88.98%   88.85%   -0.13%     
==========================================
  Files         291      291              
  Lines       40717    41092     +375     
==========================================
+ Hits        36233    36514     +281     
- Misses       4484     4578      +94     

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