fix: avoid as_ref() call as bstr could break downstream with new impls (#1466)

As `bstr` adds a new implementation of `AsRef`, the `as_ref()` call becomes
ambiguous which will then break `gitoxide`.

Now `as_ref()` is avoided in favor of a method that can't fail.

Author: Byron

gitoxide-core/src/repository/status.rs

@@ -1,5 +1,5 @@
 use anyhow::bail;
-use gix::bstr::{BStr, BString};
+use gix::bstr::{BStr, BString, ByteSlice};
 use gix::status::index_worktree::iter::Item;
 use gix_status::index_as_worktree::{Change, Conflict, EntryStatus};
 use std::path::Path;
@@ -152,7 +152,7 @@ pub fn show(
                     source_rela_path =
                         gix::path::relativize_with_prefix(&gix::path::from_bstr(source.rela_path()), prefix).display(),
                     dest_rela_path = gix::path::relativize_with_prefix(
-                        &gix::path::from_bstr(dirwalk_entry.rela_path.as_ref()),
+                        &gix::path::from_bstr(dirwalk_entry.rela_path.as_bstr()),
                         prefix
                     )
                     .display(),

gix-credentials/src/program/mod.rs

@@ -80,7 +80,7 @@ impl Program {
                 args.insert_str(0, "credential-");
                 args.insert_str(0, " ");
                 args.insert_str(0, git_program.to_string_lossy().as_ref());
-                gix_command::prepare(gix_path::from_bstr(args.as_ref()).into_owned())
+                gix_command::prepare(gix_path::from_bstr(args.as_bstr()).into_owned())
                     .arg(action.as_arg(true))
                     .with_shell_allow_argument_splitting()
                     .into()