Add gtsa

.github/workflows/docs.yml

@@ -40,6 +40,7 @@ jobs:
           pip install .
           pip install pdoc3
           pip install goespy@git+https://github.com/spestana/goes-py
+          pip install gtsa@git+https://github.com/friedrichknuth/gtsa
       # ADJUST THIS: build your documentation into docs/.
       # We use a custom build script for pdoc itself, ideally you just run `pdoc -o docs/ ...` here.
       - run: |