Add image shas

Signed-off-by: Robert Young <robertyoungnz@gmail.com>

Author: robobario

_posts/2026-04-01-release-0_20_0.md

@@ -49,8 +49,8 @@ Container images are available on quay.io:
 
 | Image | Repository |
 |---|---|
-| Proxy | [quay.io/kroxylicious/kroxylicious:0.20.0](https://quay.io/repository/kroxylicious/kroxylicious?tab=tags) |
-| Operator | [quay.io/kroxylicious/operator:0.20.0](https://quay.io/repository/kroxylicious/operator?tab=tags) |
+| Proxy | [quay.io/kroxylicious/kroxylicious:0.20.0](https://quay.io/repository/kroxylicious/kroxylicious?tab=tags) (`sha256:6f9189cea822d3a96f00d1696b3ffad9a410be0fa0fce46900141756c7c9ca66`)|
+| Operator | [quay.io/kroxylicious/operator:0.20.0](https://quay.io/repository/kroxylicious/operator?tab=tags) (`sha256:f12189f8b056e317d3c595a2009b016d6439f9906247bf7693edd24bee33dc9f`)|
 
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