link to the new doc instead of the old error :)

doc/python/KernelMagics.ipynb

@@ -11,7 +11,7 @@
     "\n",
     "There are also [Polyglot Magics](../groovy/PolyglotMagic.ipynb) magics for accessing Python from the JVM.\n",
     "\n",
-    "Fleshing out the polyglot support in BeakerX with communication between languages ([#5039](https://github.com/twosigma/beakerx/issues/5039)) is on the agenda.\n",
+    "You can communicate between languages with [Autotranslation](GeneralAutotranslation.ipynb).\n",
     "\n",
     "## Groovy"
    ]
@@ -249,6 +249,19 @@
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
    "version": "3.6.5"
+  },
+  "toc": {
+   "base_numbering": 1,
+   "nav_menu": {},
+   "number_sections": false,
+   "sideBar": false,
+   "skip_h1_title": false,
+   "title_cell": "Table of Contents",
+   "title_sidebar": "Contents",
+   "toc_cell": false,
+   "toc_position": {},
+   "toc_section_display": false,
+   "toc_window_display": false
   }
  },
  "nbformat": 4,