rosenthal: Add go-github-com-go-redis-redis-v9.

* rosenthal/packages/golang.scm (go-github-com-go-redis-redis-v9): New
variable.

rosenthal/packages/golang.scm

@@ -162,6 +162,33 @@ Go testing, with building blocks for custom assertions.")
 for structs and individual fields based on tags.")
     (license license:expat)))
 
+(define-public go-github-com-go-redis-redis-v9
+  (package
+    (name "go-github-com-go-redis-redis-v9")
+    (version "9.0.0-rc.2")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/redis/go-redis")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "1ps0ynjf0f81qnaigih7v687151i5dacx8xws6mwddnq6ln930hw"))))
+    (build-system go-build-system)
+    (arguments
+     '(#:tests? #f                     ;Tests require a redis-server instance.
+       #:import-path "github.com/go-redis/redis/v9"))
+    (propagated-inputs
+     (list go-github-com-cespare-xxhash-v2
+           go-github-com-dgryski-go-rendezvous
+           go-github-com-onsi-ginkgo
+           go-github-com-onsi-gomega))
+    (home-page "https://redis.uptrace.dev/")
+    (synopsis "Type-safe Redis client for Go")
+    (description "This package provides a type-safe Redis client for Go.")
+    (license license:bsd-2)))
+
 (define-public go-github-com-google-gopacket
   (package
     (name "go-github-com-google-gopacket")