ci(model-server-openapi): fix bundling of specs with Redocly

The behavior of the `bundle` command with the `--output` option was deliberately[^1] changed.

[^1]: Redocly/redocly-cli#1776 (comment)

Author: Oleksandr Dzhychko

model-server-openapi/build.gradle.kts

@@ -26,7 +26,7 @@ val bundleSpecs = tasks.register<NpxTask>("bundleSpecs") {
     outputs.dir(bundleDir)
 
     command.set("redocly")
-    args.addAll("bundle", "--output", bundleDir.toString())
+    args.addAll("bundle")
 }
 
 // We combine all specifications into one to deduplicate things like the Problem type

model-server-openapi/redocly.yaml

@@ -5,13 +5,16 @@ plugins:
 apis:
   model-server@v2:
     root: ./specifications/model-server-v2.yaml
+    output: ./build/bundled/model-server-v2.yaml
     decorators:
       plugin/use-server-path: {}
   model-server@v1:
     root: ./specifications/model-server-v1.yaml
+    output: ./build/bundled/model-server-v1.yaml
     decorators:
       plugin/use-server-path: {}
   model-server@operative:
     root: ./specifications/model-server-operative.yaml
+    output: ./build/bundled/model-server-operative.yaml
     decorators:
       plugin/use-server-path: {}