fixup gix-testtools manifest to allow releasing all other crates.

This works around a shortcoming of `cargo smart-release` which will
update crates in manifests even if they are not using a `path` field.

Author: Byron

Cargo.lock

@@ -18,8 +18,8 @@ gix-lock = "10"
 gix-discover = "0.26"
 gix-ignore = "0.8"
 gix-worktree = "0.26"
-gix-fs = { version = "^0.8.0" }
-gix-tempfile = { version = "^11.0.0", default-features = false, features = ["signals"] }
+gix-fs = { version = "0.9.0", path = "../../gix-fs" }
+gix-tempfile = { version = "12.0.0", default-features = false, features = ["signals"], path = "../../gix-tempfile" }
 
 winnow = { version = "0.5.24", features = ["simd"] }
 fastrand = "2.0.0"