Fix Python version to 3.13

Author: mathieucarbou

.github/workflows/pre-commit.yml

@@ -38,7 +38,7 @@ jobs:
         with:
           cache-dependency-path: pre-commit.requirements.txt
           cache: "pip"
-          python-version: "3.x"
+          python-version: "3.13"
 
       - name: Get Python version hash
         run: |

.github/workflows/publish-pio-registry.yml

@@ -49,7 +49,7 @@ jobs:
       - name: Python
         uses: actions/setup-python@v6
         with:
-          python-version: "3.x"
+          python-version: "3.13"
 
       - name: Install PlatformIO CLI
         run: |