Fix typo in AvoidUsingCmdletAliases documentation (#1590)

RuleDocumentation/AvoidUsingCmdletAliases.md

@@ -5,7 +5,7 @@
 ## Description
 
 An alias is an alternate name or nickname for a CMDLet or for a command element, such as a function, script, file, or executable file.
-You can use the alias instead of the command name in any Windows PowerShell commands. There are also implicit aliases: When PowerShell cannot find the cmdlet name, it will try to append `Get-` to the command as a last resort before, therefore e.g. `verb` will excute `Get-Verb`.
+You can use the alias instead of the command name in any Windows PowerShell commands. There are also implicit aliases: When PowerShell cannot find the cmdlet name, it will try to append `Get-` to the command as a last resort before, therefore e.g. `verb` will execute `Get-Verb`.
 
 Every PowerShell author learns the actual command names, but different authors learn and use different aliases. Aliases can make code difficult to read, understand and
 impact availability.