chore: Rust release, set prerelease:false and version=0.0.2504301132 (#755)

The generated DotSlash file has URLs that refer to
`https://github.com/openai/codex/releases/`, so let's set
`prerelease:false` (but keep `draft:true` for now) so those URLs should
work.

Also updated `version` in Cargo workspace so I will kick off a build
once this lands.

codex-rs/Cargo.lock

@@ -469,7 +469,7 @@ dependencies = [
 
 [[package]]
 name = "codex-cli"
-version = "0.0.2504292236"
+version = "0.0.2504301132"
 dependencies = [
  "anyhow",
  "clap",
@@ -523,7 +523,7 @@ dependencies = [
 
 [[package]]
 name = "codex-exec"
-version = "0.0.2504292236"
+version = "0.0.2504301132"
 dependencies = [
  "anyhow",
  "chrono",

codex-rs/Cargo.toml

@@ -11,7 +11,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.0.2504292236"
+version = "0.0.2504301132"
 
 [profile.release]
 lto = "fat"