update the behavior for profile override

[TingDaoK]

Issue #, if available:

• We say we do what aws-cli does, here
• But, according to CLI doc here:

Specifies the name of the AWS CLI profile with the credentials and options to use. This can be the name of a profile stored in a credentials or config file, or the value default to use the default profile.
If defined, this environment variable overrides the behavior of using the profile named [default] in the configuration file. You can override this environment variable by using the --profile command line parameter.

Description of changes:

• Change the behavior to make sure the provided profile override the environment variable.

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

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (4047b61) 67.86% compared to head (fefbab5) 67.86%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #30   +/-   ##
=======================================
  Coverage   67.86%   67.86%           
=======================================
  Files           9        9           
  Lines        2605     2605           
=======================================
  Hits         1768     1768           
  Misses        837      837           

Impacted Files	Coverage Δ
source/aws_profile.c	68.16% <0.00%> (ø)

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[waahm7]

fix & ship.