docs: update tools.slack.dev refs to docs.slack.dev/tools

[mwbrooks]

CHANGELOG

Update the Slack CLI output to use the new https://docs.slack.dev/tools URL instead of the previous https://tools.slack.dev URL.

Summary

This pull request updates some Slack CLI output that references https://tools.slack.dev/ to now be https://docs.slack.dev/tools/.

Requirements

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

❌ Patch coverage is 62.50000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.02%. Comparing base (2e9d58b) to head (8ecf907).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/function/function.go	0.00%	1 Missing ⚠️
cmd/project/create.go	0.00%	1 Missing ⚠️
internal/update/cli.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #183      +/-   ##
==========================================
- Coverage   63.05%   63.02%   -0.03%     
==========================================
  Files         212      212              
  Lines       21608    21608              
==========================================
- Hits        13624    13619       -5     
- Misses       6941     6944       +3     
- Partials     1043     1045       +2     

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[lukegalbraithrussell]

Thanks for doing this!

[mwbrooks]

Thanks for the quick review @lukegalbraithrussell!