Fix an edge offense for `Style/SymbolProc`

[ydah]

see: https://github.com/rubocop/rubocop-rspec/actions/runs/9147530544/job/25149073488?pr=1876

Inspecting 272 files
.................................................................................C..............................................................................................................................................................................................

Offenses:

lib/rubocop/cop/rspec/multiple_expectations.rb:[7](https://github.com/rubocop/rubocop-rspec/actions/runs/9147530544/job/25149073488?pr=1876#step:5:8)5:25: C: [Correctable] Style/SymbolProc: Pass &:true_type? as an argument to lambda instead of a block.
        TRUE = ->(node) { node.true_type? }
                        ^^^^^^^^^^^^^^^^^^^

272 files inspected, 1 offense detected, 1 offense autocorrectable
Error: Process completed with exit code 1.

---

Before submitting the PR make sure the following are checked:

• [x] Feature branch is up-to-date with master (if not - rebase it).
• [x] Squashed related commits together.
• [-] Added tests.
• [-] Updated documentation.
• [-] Added an entry to the CHANGELOG.md if the new code introduces user-observable changes.
• [x] The build (bundle exec rake) passes (be sure to run this locally, since it may produce updated documentation that you will need to commit).