fix(agent, forge): Conform web_search.py to duckduckgo_search v5

[kcze]

Update web_search command for both autogpt and forge to adjust for breaking change in v5 of duckduckgo_search,
update duckduckgo_search to ^5.0.0

[netlify]

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Name	Link
🔨 Latest commit	1592fb4
🔍 Latest deploy log	https://app.netlify.com/sites/auto-gpt-docs/deploys/6601d7a9eb44dc0008251635

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.46%. Comparing base (5f9cc58) to head (1592fb4).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7046      +/-   ##
==========================================
- Coverage   45.51%   45.46%   -0.05%     
==========================================
  Files         139      139              
  Lines        6530     6528       -2     
  Branches      917      917              
==========================================
- Hits         2972     2968       -4     
- Misses       3408     3410       +2     
  Partials      150      150              

Flag	Coverage Δ
Linux	45.38% <ø> (-0.02%)	⬇️
Windows	43.62% <ø> (-0.02%)	⬇️
autogpt-agent	45.43% <ø> (-0.05%)	⬇️
macOS	?

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