Add PGO v4.5.6 Release Notes

[sc-13826]

Author: andrewlecuyer

docs/content/releases/4.5.6.md

@@ -0,0 +1,18 @@
+---
+title: "4.5.6"
+date:
+draft: false
+weight: 65
+---
+
+Crunchy Data announces the release of PGO, the Postgres Operator 4.5.6.
+
+The PostgreSQL Operator is released in conjunction with the [Crunchy Container Suite](https://github.com/CrunchyData/crunchy-containers/).
+
+PostgreSQL Operator 4.5.6 release includes the following software versions upgrades:
+
+- [PostgreSQL](https://www.postgresql.org) versions 13.6, 12.10, 11.15 and 10.20 are now available.
+
+## Changes
+
+- The version of Go utilized to build `yq` is now aligned with all other Go binaries.