Fix OpenAPI client when Path variables contains upper case

[rjambrecic]

Description

Please include a summary of the change and specify which issue is being addressed. Additionally, provide relevant motivation and context.

Fixes # (issue number)

Type of change

Please delete options that are not relevant.

• Bug fix (a non-breaking change that resolves an issue)

Checklist

• My code adheres to the style guidelines of this project (scripts/lint.sh shows no errors)
• I have conducted a self-review of my own code
• I have made the necessary changes to the documentation
• My changes do not generate any new warnings
• I have added tests to validate the effectiveness of my fix or the functionality of my new feature
• Both new and existing unit tests pass successfully on my local environment by running scripts/test-cov.sh
• I have ensured that static analysis tests are passing by running scripts/static-anaylysis.sh
• I have included code examples to illustrate the modifications

[codecov]

Codecov Report

Attention: Patch coverage is 80.76923% with 5 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
fastagency/api/openapi/client.py	80.76%	2 Missing and 3 partials ⚠️

Files with missing lines	Coverage Δ
fastagency/api/openapi/client.py	87.14% <80.76%> (-1.46%)	⬇️