Bug 1878651 - [devtools] Update localization note for inactive CSS to…

…oltips r=devtools-reviewers,fluent-reviewers,nchevobbe,flod

Differential Revision: https://phabricator.services.mozilla.com/D200927

devtools/client/locales/en-US/tooltips.ftl

@@ -77,7 +77,8 @@ inactive-css-text-wrap-balance-fragmented = <strong>{ $property }</strong> has n
 
 ## In the Rule View when a CSS property cannot be successfully applied we display
 ## an icon. When this icon is hovered this message is displayed to explain how
-## the problem can be solved.
+## the problem can be solved. CSS properties and values in <strong> tags should
+## not be translated.
 
 inactive-css-not-grid-or-flex-container-fix = Try adding <strong>display:grid</strong> or <strong>display:flex</strong>. { learn-more }