fix: use const for call tasks

Signed-off-by: Matthias Pichler <[email protected]>

Author: matthias-pichler

schema/workflow.yaml

@@ -136,7 +136,7 @@ $defs:
       - properties:
           call:
             type: string
-            constant: asyncapi
+            const: asyncapi
           with:
             type: object
             properties:
@@ -167,7 +167,7 @@ $defs:
       - properties:
           call:
             type: string
-            constant: grpc
+            const: grpc
           with:
             type: object
             properties:
@@ -206,7 +206,7 @@ $defs:
       - properties:
           call:
             type: string
-            constant: http
+            const: http
           with:
             type: object
             properties:
@@ -231,7 +231,7 @@ $defs:
       - properties:
           call:
             type: string
-            constant: openapi
+            const: openapi
           with:
             type: object
             properties: