add materializable to vale keywords

docs/vale/styles/config/vocabularies/Dagster/accept.txt

@@ -6,6 +6,7 @@ Declarative Automation
 dagster-.*
 gRPC
 [Mm]aterializations
+[Mm]aterializable
 [Mm]emoization
 REST API
 [Ss]ubprocess

examples/docs_beta_snippets/docs_beta_snippets/guides/data-assets/quality-testing/freshness-checks/anomaly-detection.py

@@ -1,3 +1,12 @@
 from dagster_cloud.anomaly_detection import build_anomaly_detection_freshness_checks
 
-freshness_checks = build_anomaly_detection_freshness_checks(assets=..., params=None)
+import dagster as dg
+
+
+@dg.observable_source_asset
+def hourly_sales(): ...
+
+
+freshness_checks = build_anomaly_detection_freshness_checks(
+    assets=[hourly_sales], params=None
+)

examples/docs_beta_snippets/setup.py

@@ -15,5 +15,5 @@
     ],
     packages=find_packages(exclude=["test"]),
     install_requires=["dagster-cloud", "dagster-aws"],
-    extras_require={"test": ["pytest", "mock", "path"]},
+    extras_require={"test": ["pytest", "mock", "path", "dagster_snowflake"]},
 )