minor #45433 Leverage the match expression (fancyweb)

This PR was merged into the 6.1 branch.

Discussion
----------

Leverage the match expression

| Q             | A
| ------------- | ---
| Branch?       | 6.1
| Bug fix?      | no
| New feature?  | no
| Deprecations? | -
| Tickets       | -
| License       | MIT
| Doc PR        | -

Tentative to leverage the `match` expression when we can in order to keep on modernizing the code (after `array_is_list()`, `str_starts_with()`, `str_ends_with()` and `str_contains()`).

Firstly, let's see if the CI is green.

Commits
-------

217dc16187 Leverage the match expression

Author: fabpot

Notification/Notification.php

@@ -167,17 +167,12 @@ protected function getDefaultEmoji(): string
             return '';
         }
 
-        switch ($this->importance) {
-            case self::IMPORTANCE_URGENT:
-                return '🌩️';
-            case self::IMPORTANCE_HIGH:
-                return '🌧️';
-            case self::IMPORTANCE_MEDIUM:
-                return '🌦️';
-            case self::IMPORTANCE_LOW:
-            default:
-                return '⛅';
-        }
+        return match ($this->importance) {
+            self::IMPORTANCE_URGENT => '🌩️',
+            self::IMPORTANCE_HIGH => '🌧️',
+            self::IMPORTANCE_MEDIUM => '🌦️',
+            default => '⛅',
+        };
     }
 
     private function computeExceptionAsString(\Throwable $exception): string