chore(deps): bump nixpkgs from b7c2ada to 2fcb964 in /nix (#5939)

Bumps [nixpkgs](https://github.com/NixOS/nixpkgs) from `b7c2ada` to `2fcb964`.
- [Commits](https://github.com/NixOS/nixpkgs/compare/b7c2ada94fe99c15b0dbcf4d11fd7850b957a436...2fcb964de67fcf60b43471c55d5d99e61a9ccb5a)

---
updated-dependencies:
- dependency-name: nixpkgs
  dependency-version: 2fcb964de67fcf60b43471c55d5d99e61a9ccb5a
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build-nightly-container.yml

@@ -89,7 +89,7 @@ jobs:
 
       # https://github.com/marketplace/actions/docker-manifest-create-action
       - name: Create and push manifest
-        uses: int128/docker-manifest-create-action@v2.25.0
+        uses: int128/docker-manifest-create-action@v2.26.0
         with:
           push: true
           tags: quay.io/invidious/invidious:master

.github/workflows/build-stable-container.yml

@@ -78,7 +78,7 @@ jobs:
 
       # https://github.com/marketplace/actions/docker-manifest-create-action
       - name: Create and push manifest
-        uses: int128/docker-manifest-create-action@v2.25.0
+        uses: int128/docker-manifest-create-action@v2.26.0
         with:
           push: true
           tags: quay.io/invidious/invidious:latest

docker/Dockerfile

@@ -2,7 +2,7 @@
 ARG OPENSSL_VERSION='3.6.3'
 ARG OPENSSL_SHA256='243a86649cf6f23eeb6a2ff2456e09e5d77dd9018a54d3d96b0c6bdd6ba6c7f1'
 
-FROM 84codes/crystal:1.20.3-alpine AS dependabot-crystal
+FROM 84codes/crystal:1.21.0-alpine AS dependabot-crystal
 
 # We compile openssl ourselves due to a memory leak in how crystal interacts
 # with openssl

nix/flake.lock

@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1785967620,
-        "narHash": "sha256-IItrdb7Puk05RqOBWZYFC5X6Wl1sJmCfh5MWVHw5iMM=",
+        "lastModified": 1786599213,
+        "narHash": "sha256-yNJd40f11EzXBjSByCB7IPpeFFAdeoSKKM67dGkfFoU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b7c2ada94fe99c15b0dbcf4d11fd7850b957a436",
+        "rev": "0e251e24a4f24e036a084b6b4b2d2491af4167f4",
         "type": "github"
       },
       "original": {