Add release date for 4.6.3 release

Author: Jonathan S. Katz

docs/content/releases/4.6.3.md

@@ -5,7 +5,7 @@ draft: false
 weight: 57
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-Crunchy Data announces the release of the PostgreSQL Operator 4.6.3 on May DD, 2021.
+Crunchy Data announces the release of the PostgreSQL Operator 4.6.3 on May 25, 2021.
 
 The PostgreSQL Operator is released in conjunction with the [Crunchy Container Suite](https://github.com/CrunchyData/crunchy-containers/).