[bug#59244] [PATCH] services: vpn: Fix type used for profile-service-type

[EuAndreh]

* gnu/services/vpn.scm (wireguard-service-type): Use a list of packages
  for extending profile-service-type instead of the package directly.
---

Right now it gives an error at build time:

  In procedure append: Wrong type argument in position 15 (expecting empty 
list): #<package wireguard-tools@1.0.20210914 gnu/packages/vpn.scm:1093 
7fd437f48dc0>

 gnu/services/vpn.scm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gnu/services/vpn.scm b/gnu/services/vpn.scm
index 5cdfa97add..20439223c0 100644
--- a/gnu/services/vpn.scm
+++ b/gnu/services/vpn.scm
@@ -877,6 +877,6 @@ (define wireguard-service-type
           (service-extension activation-service-type
                              wireguard-activation)
           (service-extension profile-service-type
-                             (const wireguard-tools))))
+                             (const (list wireguard-tools)))))
    (description "Set up Wireguard @acronym{VPN, Virtual Private Network}
 tunnels.")))
-- 
2.38.1