Update microsoft-defender-endpoint-linux to remove reference to x86

Given that AMD64 and EM64T are in fact the implementation of x86-64, let's remove the 'x86_64' reference from this article, as it does generate some confusion.

Author: josecons-msft

defender-endpoint/microsoft-defender-endpoint-linux.md

@@ -59,7 +59,7 @@ Microsoft Defender for Endpoint for Linux includes anti-malware and endpoint det
   > [!NOTE]
   > Performance tuning might be needed based on workloads. See [Troubleshoot performance issues for Microsoft Defender for Endpoint on  Linux](linux-support-perf.md).
 
-- The following Linux server distributions and x64 (AMD64/EM64T) and x86_64 versions are supported:
+- The following Linux server distributions and x64 (AMD64/EM64T) versions are supported:
   - Red Hat Enterprise Linux 7.2 or higher
   - Red Hat Enterprise Linux 8.x
   - Red Hat Enterprise Linux 9.x