ci: Set custom release suffix for Packit

We want a high release number (99) for the daily builds done by
Packit to make sure the Copr daily builds are always newer than
the version in Fedora. We can do this in Packit config instead of
bumping the release in the spec everytime.

.packit.yaml

@@ -11,13 +11,19 @@ jobs:
     targets:
     - fedora-all
   trigger: pull_request
+  actions:
+    post-upstream-clone:
+      - 'bash -c "sed -i -r \"s/Release:(\s*)\S+/Release: 99%{?dist}/\" blivet-gui.spec"'
 
 - job: copr_build
   trigger: commit
   owner: "@storage"
   project: blivet-daily
   branch: main
   preserve_project: true
+  actions:
+    post-upstream-clone:
+      - 'bash -c "sed -i -r \"s/Release:(\s*)\S+/Release: 99%{?dist}/\" blivet-gui.spec"'
 
 - job: propose_downstream
   trigger: release

blivet-gui.spec

@@ -1,7 +1,7 @@
 Summary: Tool for data storage configuration
 Name: blivet-gui
 Version: 2.4.2
-Release: 99%{?dist}
+Release: 1%{?dist}
 Source0: http://github.com/storaged-project/blivet-gui/releases/download/%{version}/%{name}-%{version}.tar.gz
 Source1: blivet-gui_event.conf
 License: GPL-2.0-or-later