Hebrew Typo Fix for Issue #14927

[pradyutf]

Fix typos in lang/main-he.json

This PR addresses the following typos in the Hebrew language file:

1. notify.connectedOneMember:

   • Before: {{name}} הצטרף למפדש
   • After: {{name}} הצטרף למפגש

2. addPeople.noResults:

   • Before: לא נמצאו תואצות מתאימות
   • After: לא נמצאו תוצאות מתאימות

3. chat.fieldPlaceHolder:

   • Before: הקלד הודעתך כאו
   • After: הקלד הודעתך כאן

These corrections improve the clarity and accuracy of the text in the application.

Fixes Issue: #14927

[jitsi-jenkins]

Hi, thanks for your contribution!
If you haven't already done so, could you please make sure you sign our CLA (https://jitsi.org/icla for individuals and https://jitsi.org/ccla for corporations)? We would unfortunately be unable to merge your patch unless we have that piece :(.

[pradyutf]

Signed it ;)
Thanks!!