### Description of the change
Introducing `tpl` function on variables related to hostname in `./templates/gitea/ingress.yaml`
### Benefits
The change is intending to support the following syntax in a values.yaml such as:
```
global:
giteaHostName: "gitea.my-org.com"
ingress:
enabled: true
hosts:
- host: "{{ .Values.global.giteaHostName }}"
paths:
- path: /
pathType: Prefix
tls:
- secretName: gitea-tls
hosts:
- "{{ .Values.global.giteaHostName }}"
```
### Possible drawbacks
N/A
### Applicable issues
N/A
### Additional information
N/A
Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/498
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.com>
Co-authored-by: Ceddaerrix <ceddaerrix@noreply.gitea.com>
Co-committed-by: Ceddaerrix <ceddaerrix@noreply.gitea.com>
