Update mongodb debian

mongodb-debian.md

@@ -13,7 +13,8 @@
 1. Start mongod without authentication and drop into a shell `sudo systemctl start mongod & mongosh`
 2. Switch over to the admin database `use admin`
 3. Create the administrative user:
-```db.createUser(
+```
+db.createUser(
   {
     user: "myUserAdmin",
     pwd: passwordPrompt(), // or cleartext password
@@ -22,4 +23,5 @@
       { role: "readWriteAnyDatabase", db: "admin" }
     ]
   }
-)```
+)
+```