Use latest URL for Features tutorial from QGIS doc (#173)

Author: tomkralidis

workshop/jupyter/content/notebooks/04-vector-data.ipynb

@@ -10,7 +10,7 @@
     "\n",
     "## Background reading\n",
     "\n",
-    "* https://docs.qgis.org/3.28/en/docs/gentle_gis_introduction/vector_data.html (Recommended!)\n",
+    "* https://docs.qgis.org/latest/en/docs/gentle_gis_introduction/vector_data.html (Recommended!)\n",
     "\n",
     "## What is vector data?\n",
     "Vector data is spatial data, generally consisting of two parts: \n",