Doc: Minor updates to Development Tooling guide.

[ClausHolbechArista]

Change Summary

Minor updates to Development Tooling guide.

Checklist

User Checklist

• N/A

Repository Checklist

• My code has been rebased from devel before I start
• I have read the CONTRIBUTING document.
• My change requires a change to the documentation and documentation have been updated accordingly.
• I have updated molecule CI testing accordingly. (check the box if not applicable)

[github-actions]

Review docs on Read the Docs

To test this pull request:

# Create virtual environment for this testing below the current directory
python -m venv test-avd-pr-4067
# Activate the virtual environment
source test-avd-pr-4067/bin/activate
# Install all requirements including PyAVD
pip install "pyavd[ansible] @ git+https://github.com/ClausHolbechArista/avd.git@doc/update-dev-install#subdirectory=python-avd" --force
# Install Ansible collection
ansible-galaxy collection install git+https://github.com/ClausHolbechArista/avd.git#/ansible_collections/arista/avd/,doc/update-dev-install --force
# Optional: Install AVD examples
cd test-avd-pr-4067
ansible-playbook arista.avd.install_examples

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[carlbuchmann]

LGTM, thanks for these updates!