Update eslint version in "Deploy Website" template installation docs

This is now the version used as standard in all Arduino Tooling projects, which the "template" is intended to be used
with

Author: per1234

workflow-templates/deploy-mkdocs-versioned-poetry.md

@@ -33,7 +33,7 @@ See the ["Deploy Website" workflow (MkDocs, Poetry) documentation](deploy-mkdocs
 
 1. Run this command:
    ```
-   poetry add --dev "gitpython@^3.1.30" "mike@^1.1.2"
+   poetry add --dev "gitpython@^3.1.31" "mike@^1.1.2"
    ```
 1. Commit the resulting `pyproject.toml` and `poetry.lock` files.