Update position of registered custom generate_reply functions for contrib/ agents per PR #794

[momuno]

Why are these changes needed?

PR #794 added registration of async human input handler. This bumped the position of the other default registered generate reply functions by 1. Two contrib/ agents were updated per this change (their generate_reply function was bumped by 1 to account for change), but three contrib/ agents were missed. This completes the bump by 1 for those three agents.

Related issue number

PR #794

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (a107233) 26.63% compared to head (f8e97b8) 38.12%.

Files	Patch %	Lines
autogen/agentchat/contrib/teachable_agent.py	0.00%	1 Missing ⚠️
autogen/agentchat/contrib/text_analyzer_agent.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #871       +/-   ##
===========================================
+ Coverage   26.63%   38.12%   +11.48%     
===========================================
  Files          28       28               
  Lines        3725     3725               
  Branches      847      847               
===========================================
+ Hits          992     1420      +428     
+ Misses       2660     2182      -478     
- Partials       73      123       +50     

Flag	Coverage Δ
unittests	38.06% <33.33%> (+11.48%)	⬆️

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