Azure deployments with dot in its name like "gpt-4.1" are not found

[Eckii24]

Describe the bug

Azure models provided with a "dot" inside of the deployment names are not found.

This is because of this logic:

go-openai/config.go

Line 73 in 658beda

return regexp.MustCompile(`[.:]`).ReplaceAllString(model, "")

Is there any reason, "." and ":" are filtered out from the deployment names?
Especially the "." is nowadays a bit confusing, because of models like "gpt-4.1" and "gpt-4.1-mini".

To Reproduce
Deploy an azure open AI model with a "dot" in its deployment name.

Expected behavior
The model was found and called.