fix: correct minor typo when version is invalid (#3393)

Author: mallusrgreat

install.ps1

@@ -78,7 +78,7 @@ function Get-Spicetify {
         $targetVersion = $v
       }
       else {
-        Write-Warning -Message "You have spicefied an invalid spicetify version: $v `nThe version must be in the following format: 1.2.3"
+        Write-Warning -Message "You have specified an invalid spicetify version: $v `nThe version must be in the following format: 1.2.3"
         Pause
         exit
       }