fix(rules): Replace deprecated braces rules

[nickvergessen]

Fix #11

Still changes things in Talk, but that looks "expected" and I couldn't find a rule for that, but at least the { is on the same line again

   4) lib/Participant.php
      ---------- begin diff ----------
--- /home/nickv/Nextcloud/27/server/appsbabies/spreed/lib/Participant.php
+++ /home/nickv/Nextcloud/27/server/appsbabies/spreed/lib/Participant.php
@@ -60,8 +60,8 @@
 	protected ?Session $session;
 
 	public function __construct(Room $room,
-								Attendee $attendee,
-								?Session $session) {
+		Attendee $attendee,
+		?Session $session) {
 		$this->room = $room;
 		$this->attendee = $attendee;
 		$this->session = $session;

      ----------- end diff -----------

Questions

• Should we keep the old rule and keep supporting 3.2?
• Or should we remove the old rule and require cs-fixer ^3.16 in composer.json? ☑️

[ChristophWurst]

curl_braces_position was added with https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/releases/tag/v3.9.1

Let's use that a minimum requirement