docs: add charts setup component to the README

README.md

@@ -48,6 +48,7 @@ To ease maintenance, the notebooks are made up of reusable components. To see wh
 Component name | Open in Colab | Tasks
 -- | -- | --
 [Environment](https://github.com/open-contracting/notebooks-ocds/blob/main/component_environment.ipynb) | [![Open in Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-contracting/notebooks-ocds/blob/main/component_environment.ipynb) | Install requirements, import packages, load extensions and configure the notebook.
+[Charts setup](https://github.com/open-contracting/notebooks-ocds/blob/main/component_charts.ipynb) | [![Open in Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-contracting/notebooks-ocds/blob/main/component_charts.ipynb) | Install charts requirements, import charts packages and define plot functions.
 [Kingfisher Process setup](https://github.com/open-contracting/notebooks-ocds/blob/main/component_setup_kingfisher.ipynb) | [![Open in Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-contracting/notebooks-ocds/blob/main/component_setup_kingfisher.ipynb) | Connect to the database. Choose the collection(s) and schema to work with.
 [Field list setup](https://github.com/open-contracting/notebooks-ocds/blob/main/component_setup_fieldlist.ipynb) | [![Open in Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-contracting/notebooks-ocds/blob/main/component_setup_fieldlist.ipynb) | Load the field list.
 [Data Registry setup](https://github.com/open-contracting/notebooks-ocds/blob/main/component_setup_registry.ipynb) | [![Open in Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-contracting/notebooks-ocds/blob/main/component_setup_registry.ipynb) | Install Cardinal, download the data, and calculate the field list.