[Frontend] Add note on the contact us page

[gchhablani]

This PR adds a note on contact page asking the users to submit details in the message.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.30%. Comparing base (96968d6) to head (7daabed).
Report is 1112 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4412      +/-   ##
==========================================
- Coverage   72.93%   69.30%   -3.63%     
==========================================
  Files          83       20      -63     
  Lines        5368     3574    -1794     
==========================================
- Hits         3915     2477    -1438     
+ Misses       1453     1097     -356     

see 64 files with indirect coverage changes

see 64 files with indirect coverage changes

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