Add mu 1.8.6 patch

patches/181451.patch

@@ -0,0 +1,29 @@
+From 333887c91c7fa26912b08daf35725bd3767040df Mon Sep 17 00:00:00 2001
+From: Charlotte Van Petegem <charlotte@vanpetegem.me>
+Date: Thu, 14 Jul 2022 10:16:39 +0200
+Subject: [PATCH] mu: 1.8.5 -> 1.8.6
+
+---
+ pkgs/tools/networking/mu/default.nix | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/pkgs/tools/networking/mu/default.nix b/pkgs/tools/networking/mu/default.nix
+index e980c8a76b81b..f711b18671ae4 100644
+--- a/pkgs/tools/networking/mu/default.nix
++++ b/pkgs/tools/networking/mu/default.nix
+@@ -14,13 +14,13 @@
+ 
+ stdenv.mkDerivation rec {
+   pname = "mu";
+-  version = "1.8.5";
++  version = "1.8.6";
+ 
+   src = fetchFromGitHub {
+     owner = "djcb";
+     repo = "mu";
+     rev = "v${version}";
+-    sha256 = "BbH8P5l3zoBKeyFUxJqXIn0sUqg80BApdJCoz+bG/uc=";
++    sha256 = "u3MN7MrfHt/ylxDoNnfwnAOKdOAbVZwvIukje0EYgOo=";
+   };
+ 
+   postPatch = ''