Fix typo in Primer 2.

Author: tymorrow

examples/courses/Primer 2/Primer 2.ipynb

@@ -12,7 +12,7 @@
     "\n",
     "PyRIID is a Python package intended to streamline the gamma spectrum synthesis and model fitting workflow.\n",
     "\n",
-    "**Itended audience:**\n",
+    "**Intended audience:**\n",
     "\n",
     "Potential or current PyRIID users studying gamma spec-related questions who want a more comprehensive demonstration of PyRIID utilities compared to Primer 1.\n",
     "\n",