Patch for whitespace causing HTTP 500 errors.

[DarrenRainey]

Description
Patch that adds qoutes around MAIL_FROM_NAME and MAIL_REPLYTO_NAME as current script will generate a .env file which causes an 500 error preventing the site from loading.

Log File: /var/log/apache2/error.log:
The environment file is invalid!
Failed to parse dotenv file. Encountered unexpected whitespace at [Asset Management System].

Fixes # (issue)
See above

Type of change
Please delete options that are not relevant.

[X ] Bug fix (non-breaking change which fixes an issue)
How Has This Been Tested?
Tested in local enviroment with mail being sent to a external email server running postfix.

[what-the-diff]

PR Summary

• Improvement of Value Storage in 'snipeit.sh' Script
  The sed command, which is a utility in the snipeit.sh script, has been updated to better handle the value of $mailfromname. This value is now saved to the .env file but wrapped in single quotes, improving script reliability and data integrity.

• Enhanced Handling of Reply-to Name in 'snipeit.sh' Script
  Similarly, the sed command has also been updated to manage the $mailreplytoname value more effectively. This modification ensures that the value is saved in the .env file while being wrapped in single quotes, ensuring optimal script performance and data validity.

[welcome]

Congrats on merging your first pull request! 🎉🎉🎉