sensu-go-backend: 6.9.2 -> 6.11.0

https://github.com/sensu/sensu-go/blob/v6.11.0/CHANGELOG-6.md#6110---2024-01-31

pkgs/servers/monitoring/sensu-go/default.nix

@@ -1,22 +1,29 @@
-{ buildGoModule, fetchFromGitHub, lib }:
+{ buildGo121Module, fetchFromGitHub, lib }:
 
 let
   generic = { subPackages, pname, postInstall ? "", mainProgram }:
-    buildGoModule rec {
+    buildGo121Module rec {
       inherit pname;
-      version = "6.9.2";
-      shortRev = "3a1ac58"; # for internal version info
+      version = "6.11.0";
+      shortRev = "9587df6"; # for internal version info
 
       src = fetchFromGitHub {
         owner = "sensu";
         repo = "sensu-go";
         rev = "v${version}";
-        sha256 = "sha256-Xd15fkoSmQXbkyEMsBvc8ewLvn+wlsZoclfDjarp1FQ=";
+        sha256 = "sha256-Vcay8vUYLjV65g526btQX0+m5n/cRocIKx7C2LuWeP4=";
       };
 
       inherit subPackages postInstall;
 
-      vendorHash = "sha256-zrwTdMlDfG1RudOfV52qOP9NMU3/XYb5TND6xyglJ0I=";
+      vendorHash = "sha256-ADqU/ZJiyZ5hAkqFXExmA8fSZxzhx42QptYu3TIlgBc=";
+
+      patches = [
+        # Without this, we get error messages like:
+        # vendor/golang.org/x/sys/unix/mremap.go:41:10: unsafe.Slice requires go1.17 or later (-lang was set to go1.16; check go.mod)
+        # The patch was generated by changing "go 1.16" to "go 1.21" and executing `go mod tidy`.
+        ./fix-go-version-error.patch
+      ];
 
       doCheck = false;