Octez: Fix [bheap] lowerbound ot to 2.0.0

Author: killian-delarue

packages/octez-internal-libs/octez-internal-libs.20.1/opam

@@ -19,7 +19,7 @@ depends: [
   "bigstringaf" { >= "0.5.0" }
   "fmt" { >= "0.8.7" }
   "astring"
-  "bheap"
+  "bheap" {>= "2.0.0"}
   "digestif" { >= "0.9.0" }
   "jsonm"
   "lwt" { >= "5.7.0" }