return to using python 3.x for builds

Author: jepler

.github/workflows/build.yml

@@ -37,7 +37,7 @@ jobs:
     - name: Set up Python 3
       uses: actions/setup-python@v4
       with:
-        python-version: "3.10"
+        python-version: "3.x"
     - name: Get CP deps
       run: python tools/ci_fetch_deps.py test ${{ github.sha }}
     - name: CircuitPython version

.github/workflows/create_website_pr.yml

@@ -23,7 +23,7 @@ jobs:
     - name: Set up Python 3
       uses: actions/setup-python@v4
       with:
-        python-version: "3.10"
+        python-version: "3.x"
     - name: Get CP deps
       run: python tools/ci_fetch_deps.py website ${{ github.sha }}
     - name: Install deps

.github/workflows/pre-commit.yml

@@ -20,7 +20,7 @@ jobs:
     - name: Set up Python 3
       uses: actions/setup-python@v4
       with:
-        python-version: "3.10"
+        python-version: "3.x"
     - name: Install deps
       run: |
         sudo apt-get install -y gettext uncrustify