chore(pkginfo): Add a comment to explain why we need this dependency and how to resolve the issue

cubicweb_api/__pkginfo__.py

@@ -34,6 +34,9 @@
     "cubicweb": ">= 3.36.0",
     "PyJWT": ">= 2.4.0",
     "pyramid-openapi3": ">= 0.14",
+    # force openapi-spec-validator to be in 0.4.x since the 0.5 breaks the API
+    # and "pyramid-openapi3" is not (yet) compatible
+    # TODO: update pyramid-openapi3 to be compatible with openapi-spec-validator@v0.5.x
     "openapi-spec-validator": ">= 0.4, < 0.5",
 }
 __recommends__ = {}