tools: update nixpkgs-unstable pins

- unstable to 73e728ddb6b7a12d18808f510813a13ee1fe4cce
- 26.05 to e49322d1ec25b45f7c587c5fd69ac826d1a57dbc

Author: nodejs-github-bot

tools/nix/openssl-matrix.nix

@@ -11,7 +11,6 @@
   # Other OpenSSL variants we want to test for:
   inherit (pkgs)
     boringssl
-    openssl_3
     openssl_3_6
     openssl_4_0
     ;

tools/nix/pkgs-26.05.nix

@@ -1,10 +1,10 @@
 arg:
 let
   repo = "https://github.com/NixOS/nixpkgs";
-  rev = "3fd11995d77cf6907257617f99da7dc8123a3cc9";
+  rev = "e49322d1ec25b45f7c587c5fd69ac826d1a57dbc";
   nixpkgs = import (builtins.fetchTarball {
     url = "${repo}/archive/${rev}.tar.gz";
-    sha256 = "1rkhimimbfygpdh5xf7irh1ncryaymkbfzv2pxjcm3b4vsyzklhj";
+    sha256 = "09c75qhjxdg8ls8fi89vl1fknhmszcan5jnrni5cr6zlv911x7pg";
   }) arg;
 in
 # Unstable channel no longer supports Intel architecture for macOS. We can use the 26.05 channel

tools/nix/pkgs.nix

@@ -1,10 +1,10 @@
 arg:
 let
   repo = "https://github.com/NixOS/nixpkgs";
-  rev = "79b35bf0bda5cd110f856aa5b5b2c5ba4460dbf5";
+  rev = "73e728ddb6b7a12d18808f510813a13ee1fe4cce";
   nixpkgs = import (builtins.fetchTarball {
     url = "${repo}/archive/${rev}.tar.gz";
-    sha256 = "1zqqiyjznlg8sb6zx7f218vz8cd68dxxxss8h768q515isk2dr08";
+    sha256 = "1n8kqbnh8axhk5g6j4qdinh4ya34ax9cc9yrj8zila0dqwjq38sp";
   }) arg;
 in
 # Unstable channel no longer supports Intel architecture for macOS. We can use the 26.05 channel