rosenthal: Add go-github-com-pelletier-go-toml-v2.

* rosenthal/packages/golang.scm (go-github-com-pelletier-go-toml-v2): New
variable.

rosenthal/packages/golang.scm

@@ -130,3 +130,22 @@ for structs and individual fields based on tags.")
      "Golang TProxy provides an easy to use wrapper for the Linux Transparent
 Proxy functionality.")
     (license license:expat)))
+
+(define-public go-github-com-pelletier-go-toml-v2
+  (package
+    (inherit go-github-com-pelletier-go-toml)
+    (name "go-github-com-pelletier-go-toml-v2")
+    (version "2.0.6")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/pelletier/go-toml")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "157159ybra60qacbphi8cdcc5aw4s9c900738n9h9bwiqwk8jwj5"))))
+    (arguments
+     '(#:import-path "github.com/pelletier/go-toml/v2"))
+    (native-inputs
+     (list go-github-com-stretchr-testify))))