chore(NODE-5997): update saslprep to ^1.1.5 (#4023)

Author: baileympearson

package-lock.json

@@ -25,7 +25,7 @@
     "email": "[email protected]"
   },
   "dependencies": {
-    "@mongodb-js/saslprep": "^1.1.0",
+    "@mongodb-js/saslprep": "^1.1.5",
     "bson": "^6.4.0",
     "mongodb-connection-string-url": "^3.0.0"
   },