add dependency on riemannian_vmps

data/modules/armarx/skills/programming_by_demonstration.json

@@ -53,6 +53,7 @@
     "armarx/skills/control": {},
     "deps/pybind": {},
     "deps/qwt/6.2.0": {},
+    "h2t/playground/riemannian_vmps": {},
     "tools/python/3.10": {}
   }
 }