debian/changelog: UNRELEASED => unstable

Gbp-Dch: Ignore

debian/changelog

-openexr (2.5.4-1) UNRELEASED; urgency=medium
+openexr (2.5.4-1) unstable; urgency=medium
 
   * New upstream release
   * debian/watch: parameters updated
@@ -6,7 +6,7 @@ openexr (2.5.4-1) UNRELEASED; urgency=medium
     - S-V bump 4.5.0 -> 4.5.1 (no changes needed)
     - set minimal ilmbase lib to v2.5.4
 
- -- Matteo F. Vescovi <mfv@debian.org>  Thu, 21 Jan 2021 23:23:09 +0100
+ -- Matteo F. Vescovi <mfv@debian.org>  Thu, 21 Jan 2021 23:24:00 +0100
 
 openexr (2.5.3-2) unstable; urgency=medium