fix url ref

notebooks/tutorials/arc_path.ipynb

@@ -563,7 +563,7 @@
    "metadata": {},
    "source": [
     "### Determine Intermediate Points Mathemetically via Unit Sphere\n",
-    "Determine the points (lat, lon) a given fraction of a [distance (d)](#Determine-Distance-Mathematically) between a starting points A (latA, lonA) and the final point B (latB, lonB) where f is a fraction along the great circle arc. `f=0` is point A and `f=1` is point B\n",
+    "Determine the points (lat, lon) a given fraction of a distance (d) between a starting points A (latA, lonA) and the final point B (latB, lonB) where f is a fraction along the great circle arc. `f=0` is point A and `f=1` is point B\n",
     "\n",
     "> Note: The points cannot be antipodal because the path is undefined\n",
     "\n",