chore: Update the mobile tagline for the donation campaign

[g123k]

Hi everyone!

We would like to update the tagline (= message on the homepage) of the mobile for the donation campaign.
FYI, in the future, we will host this content on a dedicated repo to be more flexible and reduce (a bit) the load on the server.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.04%. Comparing base (dc04d18) to head (a3d3f39).
Report is 725 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10937      +/-   ##
==========================================
- Coverage   49.54%   49.04%   -0.50%     
==========================================
  Files          67       77      +10     
  Lines       20650    22236    +1586     
  Branches     4980     5315     +335     
==========================================
+ Hits        10231    10906     +675     
- Misses       9131     9996     +865     
- Partials     1288     1334      +46     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.