Merge branch '46619-strong-tag-font-weight' into 'master'

Resolve "The font is too bold in Issue events tab on Activity page"

Closes #46619

See merge request gitlab-org/gitlab-ce!19291

app/assets/stylesheets/bootstrap_migration.scss

@@ -36,6 +36,11 @@ html [type="button"],
   cursor: pointer;
 }
 
+b,
+strong {
+  font-weight: bold;
+}
+
 a {
   color: $gl-link-color;
 }