feat(go): enable workflows SDK generation (#275)

Remove workflows from the golang blocklist now that:
- stackit-api has x-stackit-sdk.include: true on the workflows OAS
- The OAS has been published to stackit-api-specifications

Author: c-thiel

languages/golang/blocklist.txt

@@ -5,4 +5,3 @@ functionsregistry
 notebooks
 pim
 stackitmarketplace
-workflows