chore: disable default features for obikindex

Explicitly sets `default-features = false` for the `obikindex` dependency to ensure no default features are activated during dependency resolution and compilation.

src/obikmer/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "obikmer"
-version = "1.2.0"
+version = "1.2.1"
 edition = "2024"
 
 [[bin]]

src/obikphylo/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-obikindex        = { path = "../obikindex" }
+obikindex        = { path = "../obikindex", default-features = false }
 obikseq          = { path = "../obikseq" }
 obikpartitionner = { path = "../obikpartitionner" }
 obiskio          = { path = "../obiskio" }