Update packages/par_incr/par_incr.0.1/opam

Author: kit-ty-kate

packages/par_incr/par_incr.0.1/opam

@@ -17,7 +17,7 @@ depends: [
   "alcotest" {>= "1.7.0" & with-test}
   "mdx" {>= "2.3.0" & with-test}
   "current_incr" {>= "0.6.1" & with-test}
-  "incremental" {>= "0.15.0" & with-test}
+  "incremental" {>= "v0.15.0" & with-test}
   "odoc" {with-doc}
 ]
 build: [