ci: Ignore repr_align_removed for cargo-semver-checks

This flagged a changed struct in the latest version. Alignment isn't
something users should be relying upon, so ignore it globally.

Author: tgross35

Cargo.toml

@@ -178,3 +178,7 @@ expl_impl_clone_on_copy = "allow"
 uninlined_format_args = "allow"
 unnecessary_cast = "allow"  # some casts like `as usize` are only needed for some targets
 used_underscore_binding = "allow"
+
+[package.metadata.cargo-semver-checks.lints]
+# Alignment is an internal detail that users must not rely upon
+repr_align_removed = "warn"