chore(nix): update nixpkgs-unstable to 4224881c

.github/workflows/renovate.yml

@@ -21,7 +21,7 @@ jobs:
           persist-credentials: false
       # Use a PAT or GitHub App token so Renovate PRs trigger the other workflows.
       - name: Run Renovate
-        uses: renovatebot/github-action@1a96852b0384df1837619d04c60b2d10d1f9ff08 # v46.1.21
+        uses: renovatebot/github-action@3064367f740a1a91cca218698a63902689cce200 # v46.1.20
         with:
           renovate-version: 43.262.1
           token: ${{ secrets.RENOVATE_TOKEN }}

flake.lock

@@ -735,11 +735,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1784835677,
-        "narHash": "sha256-99n/+kX5HRtEouTsNNyz5pMfIpNMp4Um/6nCEDQ9YDs=",
+        "lastModified": 1784923417,
+        "narHash": "sha256-2YNAizXueK26ockL3vo9QcaSxNbGAzXUUA+VDSJDpiY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "d4221905ef70b7f4a40701ce98e3e25c3d95d082",
+        "rev": "4224881cd3e5fab0d78abf2c469b4521f7351ad3",
         "type": "github"
       },
       "original": {