Update to 0.28.3 upstream release

Upstream tag: 0.28.3
Upstream commit: 557c33bd

Commit authored by Packit automation (https://packit.dev/)

plans/packit-integration.fmf

@@ -2,12 +2,12 @@ discover:
     how: fmf
     url: https://github.com/packit/packit
     filter: tier:0 | tier:1
-    ref: f760ddec7887881115001a79235034e0ad5496d1
+    ref: e009705539b8565841c3d7538292ef6392854013
 prepare:
   - how: install
     copr: packit/packit-dev
   - how: shell
-    script: dnf -y config-manager --save --setopt="*:packit:packit-dev.priority=5"
+    script: sed -i -n '/^priority=/!p;$apriority=5' /etc/yum.repos.d/*:packit:packit-dev.repo
 adjust:
   - when: how == integration
     because: provide latest python-specfile rpm when running locally