change target of mypy to src/databricks instead of src.

I think this might fix the CI code-quality checks failure, but unfortunately I can't replicate that failure locally and the error message is unhelpful

Signed-off-by: wyattscarpenter <[email protected]>

.github/workflows/code-quality-checks.yml

@@ -160,4 +160,4 @@ jobs:
       #              mypy the code
       #----------------------------------------------
       - name: Mypy
-        run: poetry run mypy --install-types --non-interactive src
+        run: poetry run mypy --install-types --non-interactive src/databricks