nix: bumped internal release number

pkgs/python-packages.nix

@@ -299,7 +299,7 b''
     };
   };
   rhodecode-vcsserver = super.buildPythonPackage {
-    name = "rhodecode-vcsserver-4.4.0";
+    name = "rhodecode-vcsserver-4.5.0";
     buildInputs = with self; [mock pytest WebTest];
     doCheck = true;
     propagatedBuildInputs = with self; [configobj dulwich hgsubversion infrae.cache mercurial msgpack-python pyramid Pyro4 simplejson subprocess32 waitress WebOb];