fix(deps): update dependency dotenv to v16

Author: renovate[bot]

package-lock.json

@@ -34,7 +34,7 @@
         "discord-tictactoe": "2.1.1",
         "discord.js": "13.1.0",
         "discordjs-button-pagination": "2.0.0",
-        "dotenv": "10.0.0",
+        "dotenv": "16.3.2",
         "js-yaml": "4.1.0",
         "mathjs": "^11.3.3",
         "nodemailer": "6.7.5",