improve description of branch protection (fix go-gitea#6886) (go-gitea#6906)

The branch protection description text were not quite accurate.

Author: jbeyerstedt

options/locale/locale_en-US.ini

@@ -1269,9 +1269,9 @@ settings.protected_branch_can_push_yes = You can push
 settings.protected_branch_can_push_no = You can not push
 settings.branch_protection = Branch Protection for Branch '<b>%s</b>'
 settings.protect_this_branch = Enable Branch Protection
-settings.protect_this_branch_desc = Prevent deletion and disable Git force pushing to the branch.
+settings.protect_this_branch_desc = Prevent deletion and disable any Git pushing to the branch.
 settings.protect_whitelist_committers = Enable Push Whitelist
-settings.protect_whitelist_committers_desc = Allow whitelisted users or teams to bypass push restrictions.
+settings.protect_whitelist_committers_desc = Allow whitelisted users or teams to push to this branch (but not force push).
 settings.protect_whitelist_users = Whitelisted users for pushing:
 settings.protect_whitelist_search_users = Search users…
 settings.protect_whitelist_teams = Whitelisted teams for pushing: