gnu: grass: Update to 7.8.4.

* gnu/packages/geo.scm (grass): Update to 7.8.4.

gnu/packages/geo.scm

@@ -1761,7 +1761,7 @@ (define-public opencpn
                    license:zlib))))
 
 (define-public grass
-  (let* ((version "7.8.2")
+  (let* ((version "7.8.4")
          (majorminor (string-join (list-head (string-split version #\.) 2) ""))
          (grassxx (string-append "grass" majorminor)))
     (package
@@ -1773,7 +1773,7 @@ (define-public grass
          (uri (string-append "https://grass.osgeo.org/" grassxx
                              "/source/grass-" version ".tar.gz"))
          (sha256
-          (base32 "1fwsm99kz0bxvjk7442qq1h45ikrmhba8bqclafb61gqg1q6ymrk"))))
+          (base32 "1yfghvp522ijww3n3l5xarjbc21rm0gmlgr3lvwxrv23bvxmllyr"))))
       (build-system gnu-build-system)
       (inputs
        `(("bzip2" ,bzip2)