### Description of the change
Corrects the spelling of the word deprecated.
### Benefits
Documentation free of misspelled words is more likely to be viewed as "professional".
### Possible drawbacks
None that I can think of
### Applicable issues
- fixes#393
### Additional information
There may be other misspelled words or incorrectly phrased passages that aren't addressed in this PR.
For reference, see the online dictionary for the correct spelling of deprecated.
https://www.merriam-webster.com/dictionary/deprecated
### Checklist
- [X] Parameters are documented in the `values.yaml` and added to the `README.md` using [readme-generator-for-helm](https://github.com/bitnami-labs/readme-generator-for-helm)
- [X] Breaking changes are documented in the `README.md`
Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/394
Reviewed-by: pat-s <pat-s@noreply.gitea.io>
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.io>
Co-authored-by: robv89r <robv8r@noreply.gitea.io>
Co-committed-by: robv89r <robv8r@noreply.gitea.io>
