[gnome-builder/wip/gtk4-port] plugins/eslint: fix category for eslint

[Christian Hergert <chergert src gnome org>]

commit 6aa4bb6f48c964927e95e6961bd9c19abb0cf438
Author: Christian Hergert <chergert redhat com>
Date:   Wed May 25 22:18:39 2022 -0700

    plugins/eslint: fix category for eslint

 src/plugins/eslint/eslint.plugin | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/plugins/eslint/eslint.plugin b/src/plugins/eslint/eslint.plugin
index 1eafe47ed..30fe4a6e5 100644
--- a/src/plugins/eslint/eslint.plugin
+++ b/src/plugins/eslint/eslint.plugin
@@ -5,5 +5,6 @@ Description=Provides linting of JavaScript and TypeScript files using eslint
 Embedded=_gbp_eslint_register_types
 Module=eslint
 Name=ESLint
+X-Category=diagnostics
 X-Diagnostic-Provider-Languages-Priority=100
 X-Diagnostic-Provider-Languages=js,typescript