[doc] Fix urls to sbt-openapi-generator in doc and script (OpenAPITools#12015)

* Fix sbt-openapi-generator URL in integration.md 

Fix URL to sbt-openapi-generator previously pointing to outdated repo outside OpenAPITools

* Fix sbt-openapi-generator URL in release_checkout

Author: jadeszek

bin/utils/release_checkout.rb

@@ -9,7 +9,7 @@
 def check_sbt_openapi_generator
   print "Checking sbt-openapi-generator... "
 
-  url = "https://raw.githubusercontent.com/upstart-commerce/sbt-openapi-generator/master/build.sbt"
+  url = "https://raw.githubusercontent.com/OpenAPITools/sbt-openapi-generator/master/build.sbt"
   open(url) do |f|
     content = f.read
     if !content.nil? && content.include?($version)

docs/integration.md

@@ -21,7 +21,7 @@ See the [openapi-generator-maven-plugin README](https://github.com/OpenAPITools/
 
 ### sbt Integration
 
-Please refer to https://github.com/upstart-commerce/sbt-openapi-generator
+Please refer to https://github.com/OpenAPITools/sbt-openapi-generator
 
 ### Bazel Integration