packit: Make the master branch repo takes precedence over fedora

[mulkieran]

No description provided.

[packit-as-a-service]

We were not able to find or create Copr project packit/stratis-storage-loopdev-3-89-copr_pull specified in the config with the following error:

Cannot create a new Copr project (owner=packit project=stratis-storage-loopdev-3-89-copr_pull chroots=['fedora-rawhide-x86_64', 'fedora-43-x86_64', 'fedora-44-x86_64']): repos: copr://packit/stratis-storage-loopdev-3-rs-master?priority=10 does not exist..

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Unless the HTTP status code above is >= 500, please check your configuration for:

1. typos in owner and project name (groups need to be prefixed with @)
2. whether the project name doesn't contain not allowed characters (only letters, digits, underscores, dashes and dots must be used)
3. whether the project itself exists (Packit creates projects only in its own namespace)
4. whether Packit is allowed to build in your Copr project
5. whether your Copr project/group is not private

[mulkieran]

The reason this is failing is that it is unnecessary.