chore: last attempt at automatic shell refresh (#820)

Author: vladfrangu

scripts/install/install.sh

@@ -346,4 +346,4 @@ info_bold "  apify --help"
 echo
 
 # Not ideal but its the only way to refresh the shell (this also means if you type exit / CTRL+D, you'll need to do it twice)
-exec $SHELL
+sh -c $SHELL