Use dashed identifiers in YAML schema (task-id not taskId)

Author: JohanLorenzo

src/taskgraph/transforms/docker_image.py

@@ -30,7 +30,7 @@
 IMAGE_BUILDER_IMAGE = {
     "path": "public/image.tar.zst",
     "type": "task-image",
-    "taskId": "EbA_upYqQn6GSpUS7t1TLw"
+    "task-id": "EbA_upYqQn6GSpUS7t1TLw"
 }
 
 transforms = TransformSequence()

src/taskgraph/transforms/task.py

@@ -490,7 +490,7 @@ def verify_index(config, index):
             # an indexed docker image
             {"indexed": str},
             # an external task image
-            {"path": str, "type": str, "taskId": str},
+            {"path": str, "type": str, "task-id": str},
         ),
         # worker features that should be enabled
         Required("relengapi-proxy"): bool,