Add description to club event model

[tobiaszwaszak]

Just added missed description field

[simonneutert]

Thank you @tobiaszwaszak! Please, follow @dangerpr-bot's suggestion.
Simply put the line below your entry in CHANGELOG.md and update your PR.

[tobiaszwaszak]

Thank you @tobiaszwaszak! Please, follow @dangerpr-bot's suggestion. Simply put the line below your entry in CHANGELOG.md and update your PR.

done

[dblock]

Since this is technically a new feature make a PR to bump the version to 2.3.

We also have these tests that do expect(event.description).to be_a String, but it should really be checking the actual value from the VCR K7, e.g. expect(event.description).to eq 'This is an event.'. Maybe an AI can quickly do that :)