Tweaked the first time contributor tooltip text

Removes the text `Handle with care` as it sounds condescending.

app/views/projects/notes/_actions.html.haml

 - access = note_max_access_for_user(note)
 - if note.has_special_role?(Note::SpecialRole::FIRST_TIME_CONTRIBUTOR)
-  %span.note-role.note-role-special.has-tooltip{ title: _("This is the author's first Merge Request to this project. Handle with care.") }
+  %span.note-role.note-role-special.has-tooltip{ title: _("This is the author's first Merge Request to this project.") }
     = issuable_first_contribution_icon
 - if access.nonzero?
   %span.note-role.note-role-access= Gitlab::Access.human_access(access)

locale/gitlab.pot

@@ -1382,7 +1382,7 @@ msgstr ""
 msgid "There are problems accessing Git storage: "
 msgstr ""
 
-msgid "This is the author's first Merge Request to this project. Handle with care."
+msgid "This is the author's first Merge Request to this project."
 msgstr ""
 
 msgid "This means you can not push code until you create an empty repository or import existing one."