save file - context name is lowercase

[dharapvj]

Describe the bug
We get our kubeconfig generated with context names in mixed case. So when we try to save csv file, it gives error as file not found. the folder in the ~/.local/state/k9s/screen-dumps/A/B is created following the mixed cased context name.. but the path mentioned in the error shows folder name with all lower case characters.

If I rename the B folder to all lower case - csv gets saved successfully.

To Reproduce
Steps to reproduce the behavior:

0. Rename your context in kubeconfig to container some capital letters.
1. Go to Deploy page in k9s and list deployments
2. Press Ctrl+S
3. See error

Expected behavior
Upton pressing Ctrl+S, csv export should be successful despite mixed cased context names in kubeconfig.

Screenshots
See error message - all lower case

See the directory name.. in caps

Versions (please complete the following information):

• OS: ubuntu
• K9s: v0.31.7]
• K8s: v1.29.2