fixed sed command syntax

main.tf

@@ -153,7 +153,7 @@ resource "null_resource" "ops" {
 provisioner "remote-exec" {
     inline = [
       "sudo sed -i -E 's/(ServerName ).*/\\1xdmod.rc.uab.edu/' /etc/httpd/conf.d/xdmod.conf",
-      "sudo sed -i -E 's/(Redirect permanent / ).*/\\1https:\/\/xdmod.rc.uab.edu/' /etc/httpd/conf.d/xdmod.conf",
+      "sudo sed -i -E 's/(Redirect permanent / ).*/\\1https:\\/\\/xdmod.rc.uab.edu/' /etc/httpd/conf.d/xdmod.conf",
       "sudo sed -i -E 's/('trusted.url.domains' => ).*/\\1[xdmod.rc.uab.edu],/' /etc/xdmod/simplesamlphp/config/config.php",
       "sudo sed -i -E 's/('session.cookie.domain' => ).*/\\1xdmod.rc.uab.edu,/' /etc/xdmod/simplesamlphp/config/config.php",
       "sudo sed -i -E 's/('language.cookie.domain' => ).*/\\1xdmod.rc.uab.edu,/' /etc/xdmod/simplesamlphp/config/config.php",