fix(bounded-collections): Fix scale-codec feature config

[dimartiro]

Description

I'm working on updating polkadot-sdk to use the latest version of bounded-collections (0.3.1) to fix an issue related to BoundedBTreeSet (also related to my previous PR).

While doing so, I ran into the following error:

 error[E0432]: unresolved import `scale_codec`
    --> /Users/diego/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/bounded-collections-0.3.1/src/codec_utils.rs:75:30
     |
  75 |     impl_prepend_compact_input!(scale_codec);
     |                                 ^^^^^^^^^^^ use of unresolved module or unlinked crate `scale_codec`

I'm not an expert in Rust, but after some experimentation, I found that this change solves the issue when testing with my fork.

That said, I'm open to suggestions if there's a better or more idiomatic way to fix it.

[bkchr]

Ty!

[bkchr]

@serban300 please also create a patch release for this tomorrow.

[serban300]

@serban300 please also create a patch release for this tomorrow.

Done: https://crates.io/crates/bounded-collections/0.3.2