Update source_installer/install.sh.in

Co-authored-by: psychedelicious <4822129+psychedelicious@users.noreply.github.com>

Author: lstein

source_installer/install.sh.in

@@ -117,10 +117,10 @@ status=$?
 if test $status -ne 0
 then
     if [ "$OS_NAME" == "osx" ]; then
-	echo "Python failed to install the environment. You may need to authorize"
-	echo "it to do so by installing the Xcode tools. See step number 3 of"
+	echo "Python failed to install the environment. You may need to install"
+	echo "the Xcode command line tools to proceed. See step number 3 of"
 	echo "https://invoke-ai.github.io/InvokeAI/INSTALL_SOURCE#walk_through for"
-	echo "Xcode installation instructions and then run this script again."
+	echo "installation instructions and then run this script again."
     else
 	echo "Something went wrong while installing Python libraries and cannot continue."
 	echo "See https://invoke-ai.github.io/InvokeAI/INSTALL_SOURCE#troubleshooting for troubleshooting"