Move the openapi source of truth

We're now generating our openapi spec out of FastAPI. This means we can go straight to the hosted spec instead of duplicating the file in github.

Author: awalker4

.github/workflows/speakeasy_sdk_generation.yml

@@ -24,7 +24,7 @@ jobs:
       create_release: true
       openapi_doc_auth_header: x-api-key
       openapi_docs: |
-        - https://raw.githubusercontent.com/Unstructured-IO/unstructured-api/main/openapi.json
+        - https://api.unstructured.io/general/openapi.json
       publish_python: true
       speakeasy_version: latest
     secrets: