Fix for an AWS illegal character issue upon certificate upload

[magneticrob]

An example cert_info value could be this:

[
["User ID", "USERIDGOESHERE"],
["Common Name", "Apple Development: Robert Baker (CERTIDGOESHERE)"],
["Organisation Unit", "ORG UNIT GOES HERE"],
["Organisation", "ORG NAME GOES HERE."],
["Country", "COUNTRY CODE"],
["Start Datetime", "2024-11-28 16:51:51 UTC"],
["End Datetime", "2025-11-28 16:51:50 UTC"]
]

"Common Name" in this case has parentheses, and was failing at this step as AWS rejected it with this error:

[16:28:39]: Request rejected by the downstream tagging service. Please check that you're only using allowed characters.

According to the docs: https://docs.aws.amazon.com/aws-cost-management/latest/APIReference/API_TagResource.html

Keys and values can only contain alphanumeric characters, spaces, and any of the following: _.:/=+@-

This change cleanses this input

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