gnu: pumpa: Update upsream URL.

Fixes <http://issues.guix.gnu.org/issue/52257>.

* gnu/packages/pumio.scm (pumpa)[source]: Replace pumpa origin.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/pumpio.scm

@@ -35,7 +35,7 @@
     (source (origin
               (method git-fetch) ; no source tarballs
               (uri (git-reference
-                    (url "git://pumpa.branchable.com/")
+                    (url "https://source.pumpa.branchable.com/")
                     (commit (string-append "v" version))))
               (sha256
                (base32