Update installer message grammar

install/hst-install-debian.sh

@@ -1775,7 +1775,7 @@ https://www.hestiacp.com/donate
 Sincerely yours,
 The Hestia Control Panel development team
 
-Made with love & pride from the open-source community around the world.
+Made with love & pride by the open-source community around the world.
 " > $tmpfile
 
 send_mail="$HESTIA/web/inc/mail-wrapper.php"

install/hst-install-ubuntu.sh

@@ -1682,7 +1682,7 @@ https://www.hestiacp.com/donate
 Sincerely yours,
 The Hestia Control Panel development team
 
-Made with love & pride from the open-source community around the world.
+Made with love & pride by the open-source community around the world.
 " > $tmpfile
 
 send_mail="$HESTIA/web/inc/mail-wrapper.php"

install/upgrade/0.10.0-190430.sh

@@ -347,6 +347,6 @@ echo "    Sincerely,"
 echo "    The Hestia Control Panel development team"
 echo ""
 echo "    www.hestiacp.com"
-echo "    Made with love & pride from the open-source community around the world."
+echo "    Made with love & pride by the open-source community around the world."
 echo ""
 echo ""