gnu: emacs-evil-surround: Don't use unstable tarball.

* gnu/packages/emacs-xyz.scm (emacs-evil-surround)[source]: Use GIT-FETCH and
GIT-FILE-NAME.

gnu/packages/emacs-xyz.scm

@@ -7194,14 +7194,13 @@ pressed simultaneously or a single key quickly pressed twice.")
     (version "1.0.0")
     (source
      (origin
-       (method url-fetch)
-       (uri (string-append
-             "https://github.com/timcharper/evil-surround/archive/v"
-             version ".tar.gz"))
-       (file-name (string-append name "-" version ".tar.gz"))
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/timcharper/evil-surround.git")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
        (sha256
-        (base32
-         "0p572jgic3q1ia1nz37kclir729ay6i2f4sa7wnaapyxly2lwb3r"))))
+        (base32 "1smv7sqhm1l2bi9fmispnlmjssidblwkmiiycj1n3ag54q27z031"))))
     (build-system emacs-build-system)
     (propagated-inputs
      `(("emacs-evil" ,emacs-evil)))