Release note addition for 'to yal'

Author: LoicRiegel

2025-03-18-nushell_0_103_0.md

@@ -46,6 +46,22 @@ As part of this release, we also publish a set of [optional plugins](https://www
 
 ## Additions
 
+### Save to YAML files with either `to yaml` or `to yml`
+
+As pointed out in [#15240](https://github.com/nushell/nushell/issues/15240), it was previously possible to load data from YAML files using the `from yaml` or `from yml` commands, but only possible to save data using `to yaml`.
+Now you can use either `to yaml` or `to yml` indistinctly to save data into YAML files.
+
+```nu
+> [[foo bar]; ["1" "2"]] | to yml
+- foo: '1'
+  bar: '2'
+```
+
+Thanks to this, the `save` command can also be used with the `.yml` extension:
+```nu
+> [[foo bar]; ["1" "2"]] | save test.yml
+```
+
 ## Breaking changes
 
 ## Deprecations