Add Logical Or example to RSpec (#1554)

Co-authored-by: Rico Sta. Cruz <rstacruz@users.noreply.github.com>

rspec.md

@@ -79,6 +79,14 @@ expect(5).to be_between(1, 10)
 expect(5).to be_within(0.05).of value
 ```
 
+### Compound expectations
+
+```rb
+expect(1).to (be < 2).or be > 5
+```
+
+Use `or`/`and` to string multiple matchers together. See: [Compound expectations](https://relishapp.com/rspec/rspec-expectations/docs/compound-expectations)
+
 ### Comparison
 
 ```rb