docs(homepage): add banner about Python 3.7 deprecation

[leandrodamascena]

Issue number: #3617

Summary

Changes

User experience

No changes in the user experience

Checklist

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• Meet tenets criteria
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented
• PR title follows conventional commit semantics

Is this a breaking change?

RFC issue number:

Checklist:

• Migration process documented
• Implement warnings (if it can live side by side)

Acknowledgment

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[sonarqubecloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
No data about Duplication

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c9bbcfb) 95.49% compared to head (c95cc72) 95.49%.
Report is 2 commits behind head on develop.

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Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3618   +/-   ##
========================================
  Coverage    95.49%   95.49%           
========================================
  Files          211      211           
  Lines         9821     9821           
  Branches      1791     1791           
========================================
  Hits          9379     9379           
  Misses         329      329           
  Partials       113      113           

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