Update documentation to mark opensource OLM as unsupported

Author: simu

docs/modules/ROOT/pages/references/parameters.adoc

@@ -31,12 +31,14 @@ The Cilium OLM is a thin wrapper around Helm, because of this the Helm values ar
 | |Helm |OLM
 |Opensource
 |✅
-|✅
+|⛔️
 |Enterprise
 |✅
 |✅
 |===
 
+NOTE: The component doesn't support the opensource OLM installation anymore, since the newest available opensource OLM tarball is for Cilium 1.15.1.
+
 == `release`
 
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