Update docs

Author: eregon

doc/contributor/workflow.md

@@ -303,17 +303,16 @@ exception.
 When the spec is fixed the `untag` command will remove the tag and you can
 commit the fix and the removal of the tag.
 
-## Running specs for Ruby 3.2 features
+## Running specs for Ruby 3.3 features
 
-TruffleRuby currently targets Ruby 3.1. However, we welcome pull requests for
-Ruby 3.2 features as long as they don't conflict significantly with
-Ruby 3.1 semantics.
+TruffleRuby currently targets Ruby 3.2. However, we welcome pull requests for
+Ruby 3.3 features as long as they don't conflict significantly with
+Ruby 3.2 semantics.
 
-It is possible to run specs for Ruby 3.2 features by setting
-`PRETEND_RUBY_VERSION`:
+It is possible to run specs for Ruby 3.3 features by setting `PRETEND_RUBY_VERSION`:
 
 ```bash
-PRETEND_RUBY_VERSION=3.2.0 jt test spec/ruby/.../some_spec.rb
+PRETEND_RUBY_VERSION=3.3.0 jt test spec/ruby/.../some_spec.rb
 ```
 
 This also works for `jt tag`/`jt untag`.