gnu: Add ruby-psych-3.

* gnu/packages/ruby.scm (ruby-psych-3): New variable.

gnu/packages/ruby.scm

@@ -7551,6 +7551,28 @@ from the YAML format.")
     (home-page "https://github.com/ruby/psych")
     (license license:expat)))
 
+(define-public ruby-psych-3
+  (package
+    (inherit ruby-psych)
+    (version "3.3.4")
+    (source (origin
+              (method git-fetch)        ;for tests
+              (uri (git-reference
+                    (url "https://github.com/ruby/psych")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name "ruby-psych" version))
+              (sha256
+               (base32
+                "11f7bxbhaj5697izap7hfbiln6lfk5cks78a498mkyhs2ylhl0fc"))))
+    (arguments
+     (list
+      #:phases
+      #~(modify-phases %standard-phases
+          (replace 'check
+            (lambda* (#:key tests? #:allow-other-keys)
+              (when tests?
+                (invoke "bundle" "exec" "rake" "default")))))))))
+
 (define-public ruby-utils
   (package
     (name "ruby-utils")