fix(docs): API reference bugs (#2119)

* fixed shipping method tax line schema name

* added dry run option to build openapi script

* fixed summary of endpoints

* fixed title of endpoint

.github/workflows/oas-test.yml

@@ -31,4 +31,4 @@ jobs:
 
       - name: Build OAS
         run: |
-          yarn openapi:generate
+          yarn openapi:generate --dry-run