[Glitch] Fix missing rules in report modal in web UI

Port 9c7f4ab8e8 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/report/category.js

@@ -21,7 +21,7 @@ const messages = defineMessages({
 });
 
 const mapStateToProps = state => ({
-  rules: state.getIn(['server', 'rules'], ImmutableList()),
+  rules: state.getIn(['server', 'server', 'rules'], ImmutableList()),
 });
 
 export default @connect(mapStateToProps)