Update Release Notes

Author: andrewlecuyer

docs/content/releases/4.7.2.md

@@ -5,7 +5,7 @@ draft: false
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-Crunchy Data announces the release of PGO, the Postgres Operator 4.7.2 on August 17, 2021.
+Crunchy Data announces the release of PGO, the Postgres Operator 4.7.2.
 
 The PostgreSQL Operator is released in conjunction with the [Crunchy Container Suite](https://github.com/CrunchyData/crunchy-containers/).