Add a constraint about git-paf.3.18.0 and h1.1.1.0

Author: dinosaure

packages/git-paf/git-paf.3.18.0/opam

@@ -23,7 +23,7 @@ depends: [
   "uri"
   "bigstringaf"
   "domain-name"
-  "h1"
+  "h1" {< "1.1.0"}
   "mirage-flow" {>= "4.0.0"}
   "tls-mirage" {>= "1.0.0"}
 ]