doc: fix broken file reference
@@ -261,7 +261,7 @@ you up to date with the multi-language support provided by Elektra.
- Finalize 1.0 [decisions](/doc/decisions). _(Markus Raab)_
- Update [API design document](/doc/DESIGN.md) _(Markus Raab and Stefan Hanreich)_
-- Update [release instructions](../todo/RELEASE) _(Robert Sowula)_
+- Update [release instructions](../todo/RELEASE.md) _(Robert Sowula)_
- Changed API documentation terms [current, latest] to [latest, master].
The API documentation of the latest release is now available at https://doc.libelektra.org/api/latest/html/ and of the current git master at https://doc.libelektra.org/api/master/html/. _(Robert Sowula)_
