DEV: add disclaimer to recently updated JSON memory usage page (#1433)

Author: dwdougherty

content/develop/data-types/json/ram.md

@@ -15,6 +15,11 @@ title: Redis JSON RAM Usage
 weight: 6
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+{{< note >}}
+Because of ongoing feature additions, improvements, and optimizations, JSON memory consumption may vary depending on the Redis version.
+Redis Community Edition version 8 was used for the examples on this page.
+{{< /note >}}
+
 Every key in Redis takes memory and requires at least the amount of RAM to store the key name, as
 well as some per-key overhead that Redis uses. On top of that, the value in the key also requires
 RAM.