vlc: update primary contact and drop external CCs (#13000)

We handle all security issues through [email protected] exclusively
now and want to limit the scope.

projects/vlc/project.yaml

@@ -1,9 +1,12 @@
 homepage: "https://github.com/videolan/vlc"
 language: c
-primary_contact: "ossfuzz@videolan.org"
+primary_contact: "security@videolan.org"
 auto_ccs:
-  - "[email protected]"
-  - "[email protected]"
+  - "[email protected]"
+  - "[email protected]"
+  - "[email protected]"
+  - "[email protected]"
+  - "[email protected]"
 sanitizers:
   - address
   - undefined