Bump Rust to 1.91.1 (#42561)

Release Notes:

- N/A

---------

Co-authored-by: Julia Ryan <juliaryan3.14@gmail.com>

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "crane": {
       "locked": {
-        "lastModified": 1758215636,
-        "narHash": "sha256-8nkzkPbdxze8CxWhKWlcLbJEU1vfLM/nVqRlTy17V54=",
+        "lastModified": 1762538466,
+        "narHash": "sha256-8zrIPl6J+wLm9MH5ksHcW7BUHo7jSNOu0/hA0ohOOaM=",
         "owner": "ipetkov",
         "repo": "crane",
-        "rev": "a669fe77a8b0cd6f11419d89ea45a16691ca5121",
+        "rev": "0cea393fffb39575c46b7a0318386467272182fe",
         "type": "github"
       },
       "original": {
@@ -17,11 +17,11 @@
     },
     "flake-compat": {
       "locked": {
-        "lastModified": 1747046372,
-        "narHash": "sha256-CIVLLkVgvHYbgI2UpXvIIBJ12HWgX+fjA8Xf8PUmqCY=",
+        "lastModified": 1761588595,
+        "narHash": "sha256-XKUZz9zewJNUj46b4AJdiRZJAvSZ0Dqj2BNfXvFlJC4=",
         "owner": "edolstra",
         "repo": "flake-compat",
-        "rev": "9100a0f413b0c601e0533d1d94ffd501ce2e7885",
+        "rev": "f387cd2afec9419c8ee37694406ca490c3f34ee5",
         "type": "github"
       },
       "original": {
@@ -33,10 +33,10 @@
     "nixpkgs": {
       "locked": {
         "lastModified": 315532800,
-        "narHash": "sha256-YPoFUJMpbuPvIS4FJBn2Sv/iWsui9S26gu2ufFWEY0g=",
-        "rev": "a1f79a1770d05af18111fbbe2a3ab2c42c0f6cd0",
+        "narHash": "sha256-5CwQ80ucRHiqVbMEEbTFnjz70/axSJ0aliyzSaFSkmY=",
+        "rev": "f6b44b2401525650256b977063dbcf830f762369",
         "type": "tarball",
-        "url": "https://releases.nixos.org/nixpkgs/nixpkgs-25.11pre864673.a1f79a1770d0/nixexprs.tar.xz"
+        "url": "https://releases.nixos.org/nixpkgs/nixpkgs-25.11pre891648.f6b44b240152/nixexprs.tar.xz"
       },
       "original": {
         "type": "tarball",
@@ -58,11 +58,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1758508617,
-        "narHash": "sha256-kx2uELmVnAbiekj/YFfWR26OXqXedImkhe2ocnbumTA=",
+        "lastModified": 1762915112,
+        "narHash": "sha256-d9j1g8nKmYDHy+/bIOPQTh9IwjRliqaTM0QLHMV92Ic=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "d2bac276ac7e669a1f09c48614538a37e3eb6d0f",
+        "rev": "aa1e85921cfa04de7b6914982a94621fbec5cc02",
         "type": "github"
       },
       "original": {