ci: force workflows to run 3.11

aiohttp still hasn't released a 3.12 build...

Author: thegamecracks

.github/workflows/pyright-lint.yml

@@ -16,7 +16,7 @@ jobs:
       with:
         cache: pip
         cache-dependency-path: pyproject.toml
-        python-version-file: pyproject.toml
+        python-version: '3.11'
     - name: Install pyright
       run: pip install pyright
     - name: Install discord-ext-pager

.github/workflows/python-publish.yml

@@ -22,7 +22,7 @@ jobs:
       with:
         cache: pip
         cache-dependency-path: pyproject.toml
-        python-version-file: pyproject.toml
+        python-version: '3.11'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip