build(flake): update flake.lock

Signed-off-by: Christina Sørensen <christina@cafkafk.com>

flake.lock

@@ -130,11 +130,11 @@
         "nixpkgs": "nixpkgs_3"
       },
       "locked": {
-        "lastModified": 1694398298,
-        "narHash": "sha256-Hi904+2V5DJhFdEy9DcARSRrGJOlYSILHUC6CgTtuZU=",
+        "lastModified": 1694484610,
+        "narHash": "sha256-aeSDkp7fkAqtVjW3QUn7vq7BKNlFul/BiGgdv7rK+mA=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "6c520f2e31f4bebeb29cc4563543de7187013575",
+        "rev": "c5b977a7e6a295697fa1f9c42174fd6313b38df4",
         "type": "github"
       },
       "original": {