build: relax the ocio-rs constraint to 0.2

Pre-existing local resolution fix so the dependency set resolves here;
Cargo.lock follows (getrandom 0.4.3 -> 0.3.4 in the ocio tree).

Cargo.lock

@@ -7566,7 +7566,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32497e9a4c7b38532efcdebeef879707aa9f794296a4f0244f6f69e9bc8574bd"
 dependencies = [
  "fastrand 2.5.0",
- "getrandom 0.4.3",
+ "getrandom 0.3.4",
  "once_cell",
  "rustix 1.1.4",
  "windows-sys 0.61.2",

crates/oak-common/Cargo.toml

@@ -30,7 +30,7 @@ toml = "0.8"
 # OpenColorIO from source — all platforms build the SAME OCIO version (distro
 # packages are too old for the bridge's API floor, e.g. Ubuntu 24.04's 2.1).
 # An explicit OCIO_INSTALL_DIR still wins over the vendored build when set.
-ocio-rs = { version = "0.2.1", features = ["bundled"] }
+ocio-rs = { version = "0.2", features = ["bundled"] }
 # Pure-Rust image I/O (crates.io `image`, MIT OR Apache-2.0); default features
 # off, TIFF enabled — the only format current callers need. oiioutils.rs
 # derives per-channel bit depths from its color-type tables and does float