chore: nix flake update / playwright update

Author: wmertens

flake.lock

@@ -66,7 +66,7 @@
           "dependencyTypes": [
             "dev"
           ],
-          "pinVersion": "1.48.1"
+          "pinVersion": "1.50.1"
         }
       ],
       "semverGroups": [
@@ -123,7 +123,7 @@
     "@napi-rs/triples": "1.2.0",
     "@node-rs/helper": "1.6.0",
     "@octokit/action": "6.1.0",
-    "@playwright/test": "1.48.1",
+    "@playwright/test": "1.50.1",
     "@types/brotli": "1.3.4",
     "@types/bun": "1.1.6",
     "@types/cross-spawn": "6.0.6",