packit: use cargo package to produce archive

Signed-off-by: Tomas Tomecek <ttomecek@redhat.com>

Author: TomasTomecek

.packit.yaml

@@ -2,10 +2,11 @@
 downstream_package_name: rust-pretty-git-prompt
 srpm_build_deps:
 - cargo
-- rust
+- cargo-rpm-macros
 actions:
   create-archive:
-  - cargo publish --dry-run --allow-dirty
+    # didn't manage to make it work with --offline, cargo cannot find the packages/crates locally
+  - cargo package --allow-dirty
   - bash -c "ls -1 target/package/*.crate"
 jobs:
   - job: copr_build