Add test case for "body"/"server" bug fix

Author: ralfhandl

tests/schema/fail/link-object-no-body.yaml

@@ -0,0 +1,11 @@
+openapi: 3.1.0
+info:
+  title: API
+  version: 1.0.0
+components:
+  links:
+    Link-Object-with-body-property:
+      operationId: getThing
+      description: The "server" property was misspelled as "body" in a previous schema iteration, now fixed
+      body:
+        url: https://things.example.com