Correct Oxford Comma in Communities of Practice Page

### Prerequisite
1. Be a member of Hack for LA. (There are no fees to join.) If you have not joined yet, please follow the steps on our [Getting Started page](https://www.hackforla.org/getting-started).
2. Please make sure you have read our **[Hack for LA Contributing Guide](https://github.com/hackforla/website/blob/gh-pages/CONTRIBUTING.md)** before you claim/start working on an issue.

### Overview
Our website needs to use the Oxford comma consistently so that the website is correct and uniform. In this issue we will be changing text on the Communities of Practice page.

### Action Items
- [ ] In your IDE, under the `pages` directory, open the`/communities-of-practice.html`
- [ ] Correct the CoP text to use the Oxford comma, so
```
Communities of Practice started at Hack for LA in 2020, post-Covid. These communities have been a vital connection point in our fully remote organization. They have enabled us to connect people across projects in ways that are both meaningful for the individuals, and have helped the organization build professional infrastructure to support our community, nonprofit and government project partnerships. These communities have also enabled Hack for LA to provide rapid response to the evolving crises of 2020.
```
becomes
```
Communities of Practice started at Hack for LA in 2020, post-Covid. These communities have been a vital connection point in our fully remote organization. They have enabled us to connect people across projects in ways that are both meaningful for the individuals, and have helped the organization build professional infrastructure to support our community, nonprofit, and government project partnerships. These communities have also enabled Hack for LA to provide rapid response to the evolving crises of 2020.
```
- [ ] Using Docker, in both desktop and mobile views, check the following:
- [ ] Communities of Practice page (`localhost:4000/communities-of-practice`)

### Resources
- 1.01 Communities of Practice Code: https://github.com/hackforla/website/blob/gh-pages/pages/communities-of-practice.html
- 1.02 Website page with issue: https://www.hackforla.org/communities-of-practice