fix: Fix text of Step 4 section in elo_qa_eval.ipynb

TASK: IL-394

src/documentation/elo_qa_eval.ipynb

@@ -418,12 +418,12 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Step 4 Addition of New Models\n",
+    "# Step 4 - Addition of New Models\n",
     "\n",
     "Now let us consider the case where we want to add new models to our existing evaluation.\n",
     "Since the comparison of answers is rather time-consuming, we want to avoid recalculating the evaluation for the previous models, and just compare the new models to the old ones. This is why we used the `IncrementalEloQaEvaluator` to begin with.\n",
     "\n",
-    "For this example, we first define the new models _\"luminous-base-control-v10\"_ and _\"luminous-supreme-control-v15\"_, and generate their answers."
+    "For this example, we first define the new models and generate their answers."
    ]
   },
   {