Restrict support to x86

Author: SNiemann15

modules/release-notes-1.0.adoc

@@ -6,7 +6,7 @@
 [id="release-notes-1.0_{context}"]
 = Release notes for {product-title} version 1.0
 
-{product-title} version 1.0 is a generally available release that is supported on {platform} versions 4.18 and 4.19.
+{product-title} version 1.0 is a generally available release that is supported on {platform} versions 4.18 and 4.19 on the 64-bit x86 architecture.
 
 {product-title} version 1.0 uses link:https://kueue.sigs.k8s.io/docs/overview/[Kueue] version 0.11.