[Buildroot] [git commit] docs/migrating.adoc: document the tarball suffix update for Cargo-fetch packages

[Arnout Vandecappelle]

commit: https://git.buildroot.net/buildroot/commit/?id=b0a62a96543065086a6ad7b44f4da39dfa42b9da
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

We changed the suffix of tarballs for Cargo-fetched packages, which
affects out-of-tree packages, so it makes sense to document that in
the migration guide.

Reported-by: Julien Olivain <ju.o at free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
Signed-off-by: Arnout Vandecappelle <arnout at rnout.be>
---
 docs/manual/migrating.adoc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/docs/manual/migrating.adoc b/docs/manual/migrating.adoc
index 1b55bc6173..ac40197147 100644
--- a/docs/manual/migrating.adoc
+++ b/docs/manual/migrating.adoc
@@ -209,3 +209,9 @@ or with a startup script.
 Note that systems using systemd are not impacted: systemd always ensures
 that `/run` is writable. Systems further using systemd-resolved already
 had a `/etc/resolv.conf` that pointed into `/run` anyway.
+
+Due to the update of Rust to a version greater than 1.84.0 making the
+Cargo.lock file mandatory and the change from +.cargo/config+ to
++.cargo/config.toml+, tarballs generated by Cargo-fetched packages
+have changed. Therefore the suffix of such tarballs has been changed
+from +-cargo2+ to +-cargo4+.