[Bug]: calendar section on landing stretches the page on table resolution

### What happened?

Steps to reproduce:

1. Open [Beam main page](https://beam.apache.org/) in the browser
2. Go to the section `Stay Up To Date with Beam`
3. Change the screen size to 1100px x 750px
4. Take a look on the calendar section

Actual result: calendar section stretches the page
Expected result: calendar section doesn't stretch the page


### Issue Priority

Priority: 3 (minor)

### Issue Components

- [ ] Component: Python SDK
- [ ] Component: Java SDK
- [ ] Component: Go SDK
- [ ] Component: Typescript SDK
- [ ] Component: IO connector
- [ ] Component: Beam examples
- [ ] Component: Beam playground
- [ ] Component: Beam katas
- [X] Component: Website
- [ ] Component: Spark Runner
- [ ] Component: Flink Runner
- [ ] Component: Samza Runner
- [ ] Component: Twister2 Runner
- [ ] Component: Hazelcast Jet Runner
- [ ] Component: Google Cloud Dataflow Runner