releasing.md in prism-0.20.0

- old
+ new
@@ -11,16 +11,16 @@
 * Update the version in the following files:
   * `prism.gemspec` in the `Gem::Specification#version=` method call
   * `ext/prism/extension.h` in the `EXPECTED_PRISM_VERSION` macro
   * `include/prism/version.h` in the version macros
   * `javascript/package.json` in the `version` field
-  * `rust/prism-sys/tests/utils_tests.rs` in the `version_test` function
+  * `rust/ruby-prism-sys/tests/utils_tests.rs` in the `version_test` function
   * `templates/java/org/prism/Loader.java.erb` in the `load` function
   * `templates/javascript/src/deserialize.js.erb` in the version constants
   * `templates/lib/prism/serialize.rb.erb` in the version constants
 * Run `bundle install` to update the `Gemfile.lock` file.
-* Update `rust/prism-sys/Cargo.toml` to match the new version and run `cargo build`
-* Update `rust/prism/Cargo.toml` to match the new version and run `cargo build`
+* Update `rust/ruby-prism-sys/Cargo.toml` to match the new version and run `cargo build`
+* Update `rust/ruby-prism/Cargo.toml` to match the new version and run `cargo build`
 * Commit all of the updated files.
 
 ## Publishing
 
 * Update the GitHub release page with a copy of the latest entry in the `CHANGELOG.md` file.