Rollup merge of #141487 - GuillaumeGomez:update-askama, r=notriddle

Update askama to `0.14.0`

[Askama 0.14.0 release notes](https://github.com/askama-rs/askama/releases/tag/v0.14.0)

Just one change needed for a filter in rustdoc.

r? ```@notriddle```

Author: GuillaumeGomez