Updating homepage animation links

Author: erikvansebille

docs/_static/homepage.gif

@@ -38,7 +38,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "The cell below provides the code needed to run this simulation - but because it is a time-consuming run (~20 minutes) and requires a login on the Copernicus Marine Service, we also provide the output file for download directly at TODO"
+    "The cell below provides the code needed to run this simulation - but because it is a time-consuming run (~20 minutes) and requires a login on the Copernicus Marine Service, we also provide the output file for download [here](https://github.com/Parcels-code/parcels-data/raw/refs/heads/main/data-parquet/copernicusmarine_globalsurface.parquet)."
    ]
   },
   {
@@ -216,7 +216,7 @@
    "source": [
     "The resulting animation is then\n",
     "\n",
-    "![gif](copernicusmarine_globalsurface.gif)"
+    "![gif](../../_static/homepage.gif)"
    ]
   }
  ],