guix home: Add missing SRFI-34 import for 'raise'.

Reported at <https://issues.guix.gnu.org/64031>.

* guix/scripts/home.scm: Use (srfi srfi-34), expected by
'list-generations'.

Reported-by: Steven Roose <steven@roose.io>

guix/scripts/home.scm

@@ -67,6 +67,7 @@
   #:use-module (guix monads)
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-26)
+  #:use-module (srfi srfi-34)
   #:use-module (srfi srfi-35)
   #:use-module (srfi srfi-37)
   #:use-module (srfi srfi-71)