Bump python version for linkcheck (#446)

The old python version no longer works with the new dependencies, which
causes link check to fail no matter what. This was missed because link
check was disabled due to inactivity on the repo.

.github/workflows/link-check.yml

@@ -12,7 +12,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-python@v4
       with:
-        python-version: 3.7
+        python-version: "3.11"
     - name: Install Dependencies
       run: pip install -r source/requirements.txt
     - name: Check Links