wip: Add alternate text for lead images

[Tlazypanda]

Fixes #7991

work in progress:add alternate text for image

• [ ] PR is descriptively titled 📑 and links the original issue above 🔗
• [ ] tests pass -- look for a green checkbox ✔️ a few minutes after opening your PR -- or run tests locally with rake test
• [ ] code is in uniquely-named feature branch and has no merge conflicts 📁
• [ ] screenshots/GIFs are attached 📎 in case of UI updation
• [ ] ask @publiclab/reviewers for help, in a comment below

Thanks!

[codecov[bot]]

Codecov Report

Merging #8106 (436485a) into main (4cb5740) will decrease coverage by 0.08%. The diff coverage is 0.00%.

:exclamation: Current head 436485a differs from pull request most recent head ccfaeee. Consider uploading reports for the commit ccfaeee to get more accurate results

@@            Coverage Diff             @@
##             main    #8106      +/-   ##
==========================================
- Coverage   81.86%   81.78%   -0.09%     
==========================================
  Files         101      101              
  Lines        5900     5906       +6     
==========================================
  Hits         4830     4830              
- Misses       1070     1076       +6     

Impacted Files	Coverage Δ
app/controllers/notes_controller.rb	81.42% <0.00%> (-1.98%)	:arrow_down:

[gitpod-io[bot]]

[stale[bot]]

Hi :smile:, this issue has been automatically marked as stale because it has not had recent activity. Don't worry you can continue to work on this and ask @publiclab/reviewers to add in-progress label :tada: . Otherwise, it will be closed if no further activity occurs in 10 days -- but you can always re-open it if you like! :100: Thank you for your contributions! :raised_hands: :balloon:.

[gitpod-io[bot]]

[qlty-cloud-legacy[bot]]

Code Climate has analyzed commit ccfaeeea and detected 1 issue on this pull request.

Here's the issue category breakdown:

Category	Count
Complexity	1

View more on Code Climate.

[stale[bot]]

Hi :smile:, this issue has been automatically marked as stale because it has not had recent activity. Don't worry you can continue to work on this and ask @publiclab/reviewers to add in-progress label :tada: . Otherwise, it will be closed if no further activity occurs in 10 days -- but you can always re-open it if you like! :100: Thank you for your contributions! :raised_hands: :balloon:.