Jinja2 'now' tag works for notifications, but cannot be saved

[mwt]

Describe the bug
The 'now' jinja tag for generating dates does work with notifications, but cannot be saved. When you try to save a notification with this tag, I get the following error:

This is not a valid Jinja2 template: Encountered unknown tag 'now'.

Version

v0.50.13

How did you install?

Docker

To Reproduce

Steps to reproduce the behavior:

1. Go to Settings -> Notifications (or any monitor's notification settings)
2. Include a now tag in the notification title or body (e.g., {% now 'America/New_York', '%Y-%m-%d' %})
3. Test the notification. This will work fine and the notification will send the correct date.
4. Save. This will fail and you will get the error.

! ALWAYS INCLUDE AN EXAMPLE URL WHERE IT IS POSSIBLE TO RE-CREATE THE ISSUE - USE THE 'SHARE WATCH' FEATURE AND PASTE IN THE SHARE-LINK! Sorry, I do not have a publicly accessible instance.

Expected behavior
I expect to be able to save it.

Screenshots

Desktop (please complete the following information):

• OS: Ubuntu 24.04
• Browser Firefox
• Version 142

Additional context
Changedetection.io blog post where this tag is supported in another context.

[dgtlmoon]

thanks, will be fixed in #3162 :)

[dgtlmoon]

fixed in 0.50.23