fix: Add missing dependency in armarx/skills/speech

data/modules/armarx/skills/speech.json

@@ -52,6 +52,7 @@
     "armarx/meta/compiler": {},
     "armarx/RobotAPI": {},
     "armarx/python3-armarx": {},
-    "armarx/skills/audio": {}
+    "armarx/skills/audio": {},
+    "armarx/skills/symbolic_planning": {}
   }
 }