getting started: use conda activate instead of activate

docs/getting_started.ipynb

@@ -14,7 +14,7 @@
     "\n",
     " * Download the [niche sourcecode](https://github.com/inbo/niche_vlaanderen/releases) (use the zip file).\n",
     " * Extract the file and navigate to the `docs` folder from the anaconda prompt. Make sure you also extract the testcases directory, as this contains the data we will be using.\n",
-    " * Activate the niche environment: `activate niche` (not necessary if you used the alternative install).\n",
+    " * Activate the niche environment: `conda activate niche` (not necessary if you used the alternative install).\n",
     " * Run Jupyter notebook: `jupyter notebook`. This should open a web page (similar or equal to http://localhost:8888 ) - check your anaconda prompt for a link if this is not the case.\n",
     " * Navigate your web browser to the `getting_started.ipynb` file (in the Files tab, which should be opened by default).\n",
     " * Any cell with code can be run by by pressing Ctrl+Enter. If you are unfamiliar with notebooks, you can take some time familiarizing yourself by taking the User interface tour from the `Help` menu.\n",