ci: update setup python's from 3.11 or 3.* to 3.13

Better to use a recent version, but didn't go for 3.14 maybe it's still
too new for some dependencies.

Author: bluetech

.github/workflows/deploy.yml

@@ -84,7 +84,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: "3.11"
+        python-version: "3.13"
 
     - name: Install tox
       run: |

.github/workflows/doc-check-links.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v6
         with:
-          python-version: "3.11"
+          python-version: "3.13"
           cache: pip
 
       - name: Install dependencies

.github/workflows/prepare-release-pr.yml

@@ -36,7 +36,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: "3.x"
+        python-version: "3.13"
 
     - name: Install dependencies
       run: |

.github/workflows/update-plugin-list.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v6
         with:
-          python-version: "3.11"
+          python-version: "3.13"
 
       - name: requests-cache
         uses: actions/cache@v4