Fix typo in isetup.xml (#474)

ISHelp/isetup.xml

@@ -3410,7 +3410,7 @@ Filename: "{win}\MYPROG.INI"; Section: "InstallSettings"; Key: "InstallPath"; St
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-<p>For example, if the search string was (Ex)(ample) and the replace string was $2$1, when applied to a script saying "Examples" this would modify the script to say "amplExs". Or if the replace string was $1\r\n$2 this would put a newline between "Ex" and "amples".</p>
+<p>For example, if the search string was (Ex)(ample) and the replace string was $2$1, when applied to a script saying "Examples" this would modify the script to say "ampleExs". Or if the replace string was $1\r\n$2 this would put a newline between "Ex" and "amples".</p>
 
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