build(deps): bump actions/setup-python from 1 to 4

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 1 to 4.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v1...v4)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Daniel Knell <contact@danielknell.co.uk>

Author: dependabot[bot]

.github/workflows/docs.yaml

@@ -16,7 +16,7 @@ jobs:
       run: sudo apt-get install -y hunspell-en-gb
 
     - name: set python version
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: "3.10"
 

.github/workflows/release-please.yml

@@ -23,7 +23,7 @@ jobs:
 
     - name: set python version
       if: ${{ steps.release.outputs.release_created }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: "3.10"
 

.github/workflows/tests.yaml

@@ -23,7 +23,7 @@ jobs:
       run: sudo apt-get install -y hunspell-en-gb
 
     - name: set python version
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: "3.10"