Correct supported Windows versions

Windows 7 or 10 -> Windows 7 or later

Author: xiaoyinl

GhidraDocs/InstallationGuide.html

@@ -66,7 +66,7 @@ <h1>Ghidra Installation Guide</h1>
 
 <h2><a name="Platforms"></a>Platforms Supported</h2>
 <ul>
-  <li>Microsoft Windows 7 or 10 (64-bit)</li>
+  <li>Microsoft Windows 7 or later (64-bit)</li>
   <li>Linux (64-bit, CentOS 7 is preferred)</li>
   <li>macOS (OS X) 10.8.3+ (Mountain Lion or later)</li>
 </ul>