fix(detect-secrets): Include missing colon to link values

[jfagoagas]

Context

extra742 uses detect-secrets to find possible secret values within strings or whole files.

Description

Right now, this checks passes to detect-secrets the following values extracted from CloudFormation Stack Outputs:

Output1 Value1
Output2 Value2
Output3 Value3

The problem is that detect-secrets can't link output values with their related values.

To fix this we've included a : to link values:

Output1:Value1
Output2:Value2
Output3:Value3

With that detect-secrets can identify possible secrets.

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[MrCloudSec]

Tested, great job 💪