Modify rule S2260: Fix list of actions to deal with analyzer failures…

… in the description (#4457)

rules/S2260/dart/rule.adoc

@@ -16,7 +16,8 @@ There are three recommended ways to deal with analysis failures:
 * Fix compiler errors.
 * Make sure you got all project dependencies, via `flutter pub get`, `dart pub get`, ...
 * Make sure all referenced generated files were generated before the analysis.
-* If you cannot fix them, let us know through the https://community.sonarsource.com/[Sonar Community forum].
+
+If you cannot fix them, let us know through the https://community.sonarsource.com/[Sonar Community forum].
 
 === Noncompliant code example