chore: align pet-hatch serde version with workspace style (PR #460)

Use serde 1.0.152 to match the dominant version string used across the workspace. Both 1.0.152 and 1.0.226 are semver-compatible and resolve to the same compiled crate, but matching the workspace style avoids inconsistency.

Keep toml at 0.9.7 (already used by pet-uv).

Author: karthiknadig

crates/pet-hatch/Cargo.toml

@@ -8,7 +8,7 @@ license.workspace = true
 pet-core = { path = "../pet-core" }
 pet-fs = { path = "../pet-fs" }
 pet-python-utils = { path = "../pet-python-utils" }
-serde = { version = "1.0.226", features = ["derive"] }
+serde = { version = "1.0.152", features = ["derive"] }
 toml = "0.9.7"
 log = "0.4.21"