Fixed Tidelift link

[julianz-]

❓ What kind of change does this PR introduce?

• 🐞 bug fix
• 🐣 feature
• [ x] 📋 docs update
• 📋 tests/coverage improvement
• 📋 refactoring
• 💥 other

📋 What is the related issue number (starting with #)
#812

Resolves #
#812

❓ What is the current behavior? (You can also link to an open issue here)
The docs front page have a block talking about Tidelift. That block has a logo that stopped being displayed recently. It needs fixing.

❓ What is the new behavior (if this is a feature change)?
The logo should be inserted by jaraco.tidelift.

📋 Other information:

📋 Contribution checklist:

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• I wrote descriptive pull request text above
• I think the code is well written
• I wrote good commit messages
• I have squashed related commits together after
  the changes have been approved
• Unit tests for the changes exist
• Integration tests for the changes exist (if applicable)
• I used the same coding conventions as the rest of the project
• The new code doesn't generate linter offenses
• Documentation reflects the changes
• The PR relates to only one subject with a clear title
  and description in grammatically correct, complete sentences

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.19%. Comparing base (4bb134f) to head (df93676).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #814      +/-   ##
==========================================
- Coverage   78.21%   78.19%   -0.03%     
==========================================
  Files          41       41              
  Lines        4788     4788              
  Branches      547      547              
==========================================
- Hits         3745     3744       -1     
  Misses        905      905              
- Partials      138      139       +1