[build] Fix the D/L URL in the installer.

indra/newview/installers/windows/installer_template.nsi

@@ -238,11 +238,8 @@ Function CheckCPUFlagsAVX2
     System::Call 'kernel32::IsProcessorFeaturePresent(i 40) i .r1'  ; 40 is PF_AVX2_INSTRUCTIONS_AVAILABLE
     IntCmp $1 1 OK_AVX2
     ; AVX2 not supported
-    ; Prepare the URL by concatenating '-legacy-cpus' to $DL_URL
-    StrCpy $2 "${DL_URL}"
-    StrCpy $2 "-legacy-cpus" /APPEND    
     ; Replace %DLURL% in the language string with the URL
-    ${WordReplace} "$(MissingAVX2)" "%DLURL%" "$2" "+*" $3
+    ${WordReplace} "$(MissingAVX2)" "%DLURL%" "${DL_URL}-legacy-cpus" "+*" $3
     MessageBox MB_OK "$3"    
     ${OpenURL} '$2'
     Quit