chore: fix orchestration-airflow docs (#13355)

Author: ohmayr

packages/google-cloud-orchestration-airflow/google/cloud/orchestration/airflow/service_v1/types/environments.py

@@ -866,10 +866,13 @@ class UserWorkloadsSecret(proto.Message):
 
             Example:
 
-            {
-              "example": "ZXhhbXBsZV92YWx1ZQ==",
-              "another-example":
-            "YW5vdGhlcl9leGFtcGxlX3ZhbHVl" }
+            .. code-block:: json
+
+                {
+                    "example": "ZXhhbXBsZV92YWx1ZQ==",
+                    "another-example": "YW5vdGhlcl9leGFtcGxlX3ZhbHVl"
+                }
+
     """
 
     name: str = proto.Field(

packages/google-cloud-orchestration-airflow/google/cloud/orchestration/airflow/service_v1beta1/types/environments.py

@@ -918,10 +918,13 @@ class UserWorkloadsSecret(proto.Message):
 
             Example:
 
-            {
-              "example": "ZXhhbXBsZV92YWx1ZQ==",
-              "another-example":
-            "YW5vdGhlcl9leGFtcGxlX3ZhbHVl" }
+            .. code-block:: json
+
+                {
+                    "example": "ZXhhbXBsZV92YWx1ZQ==",
+                    "another-example": "YW5vdGhlcl9leGFtcGxlX3ZhbHVl"
+                }
+
     """
 
     name: str = proto.Field(