Update 06_Training_embeddings_using_gensim.ipynb

we've just trained a SkipGram model, so more appropriate to save it

Author: faisito

Ch3/06_Training_embeddings_using_gensim.ipynb

@@ -838,7 +838,7 @@
    "outputs": [],
    "source": [
     "# save model\n",
-    "word2vec_cbow.wv.save_word2vec_format('word2vec_sg.bin', binary=True)\n",
+    "word2vec_skipgram.wv.save_word2vec_format('word2vec_sg.bin', binary=True)\n",
     "\n",
     "# load model\n",
     "# new_model_skipgram = Word2Vec.load('model_skipgram.bin')\n",