Add Python to the list of dependencies (nhs-england-tools#140)

## Description

The pre-commit framework requires Python to be installed. This change is
to add it to the list of documented dependencies.

## Type of changes

- [ ] Refactoring (non-breaking change)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would change existing
functionality)
- [ ] Bug fix (non-breaking change which fixes an issue)

## Checklist

- [x] I am familiar with the [contributing
guidelines](../docs/CONTRIBUTING.md)
- [x] I have followed the code style of the project
- [ ] I have added tests to cover my changes
- [x] I have updated the documentation accordingly
- [ ] This PR is a result of pair or mob programming

---

## Sensitive Information Declaration

To ensure the utmost confidentiality and protect your and others
privacy, we kindly ask you to NOT including [PII (Personal Identifiable
Information) / PID (Personal Identifiable
Data)](https://digital.nhs.uk/data-and-information/keeping-data-safe-and-benefitting-the-public)
or any other sensitive data in this PR (Pull Request) and the codebase
changes. We will remove any PR that do contain any sensitive
information. We really appreciate your cooperation in this matter.

- [x] I confirm that neither PII/PID nor sensitive data are included in
this PR and the codebase changes.

Author: stefaniuk

README.md

@@ -43,12 +43,13 @@ cd nhs-england-tools/repository-template
 
 ### Prerequisites
 
-The following software packages, or their equivalents, are expected to be installed:
+The following software packages, or their equivalents, are expected to be installed and configured:
 
 - [docker](https://www.docker.com/) container runtime or a compatible tool, e.g. [podman](https://podman.io/),
 - [asdf](https://asdf-vm.com/) version manager,
 - [GNU make](https://www.gnu.org/software/make/) 3.82 or later,
 - [GNU coreutils](https://www.gnu.org/software/coreutils/) and [GNU binutils](https://www.gnu.org/software/binutils/) may be required to build dependencies like Python, which may need to be compiled during installation. For macOS users, this has been scripted and automated by the `dotfiles` project; please see this [script](https://github.com/nhs-england-tools/dotfiles/blob/main/assets/20-install-base-packages.macos.sh) for details,
+- [Python](https://www.python.org/) required to run Git hooks,
 - [jq](https://jqlang.github.io/jq/) a lightweight and flexible command-line JSON processor.
 
 > [!NOTE]<br>