Build COPR builds for maint-1.3

[jan-cerny]

This change will cause automatic building of COPR builds after committing to maint-1.3 branch. The maint-1.3 branch isn't the project default branch. Without specifying the branch, Packit builds after committing only to the project's default branch, which is the main branch at this moment. The maint-1.3 branch used to be default branch, but after we switched the default branch to main, the COPR builds on maint-1.3 stopped to be built.

Related documentation:
https://packit.dev/docs/configuration/upstream/copr_build

[packit-as-a-service]

Failed to load packit config file:

Cannot parse package config. ValidationError({'_schema': ["Keys: {'branch'} are defined outside job metadata dictionary. Mixing obsolete metadata dictionary and new job keys is not possible. Remove obsolete nested job metadata dictionary."]})

For more info, please check out the documentation or contact the Packit team. You can also use our CLI command validate-config or our pre-commit hooks for validation of the configuration.

[packit-as-a-service]

Failed to load packit config file:

Cannot parse package config. ValidationError({'_schema': ["Keys: {'branch'} are defined outside job metadata dictionary. Mixing obsolete metadata dictionary and new job keys is not possible. Remove obsolete nested job metadata dictionary."]})

For more info, please check out the documentation or contact the Packit team. You can also use our CLI command validate-config or our pre-commit hooks for validation of the configuration.

[packit-as-a-service]

Failed to load packit config file:

Cannot parse package config. ValidationError({'_schema': ["Keys: {'branch'} are defined outside job metadata dictionary. Mixing obsolete metadata dictionary and new job keys is not possible. Remove obsolete nested job metadata dictionary."]})

For more info, please check out the documentation or contact the Packit team. You can also use our CLI command validate-config or our pre-commit hooks for validation of the configuration.