🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

samples/README.md

@@ -1878,7 +1878,7 @@ View the [source code](https://github.com/googleapis/nodejs-spanner/blob/main/sa
 __Usage:__
 
 
-`node snapshot-isolation.js <INSTANCE_ID> <DATABASE_ID> <PROJECT_ID>`
+`node repeatable-reads.js <INSTANCE_ID> <DATABASE_ID> <PROJECT_ID>`
 
 
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