Update README.md

[CaroFG]

• Remove mention of Hacktoberfest 2022
• Remove Slack badge
• Replace Slack link with Discord

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
demo-ecommerce	🔄 Building (Inspect)		Jan 31, 2023 at 3:31PM (UTC)
demo-finding-crates	🔄 Building (Inspect)		Jan 31, 2023 at 3:31PM (UTC)
demo-finding-pypi	🔄 Building (Inspect)		Jan 31, 2023 at 3:31PM (UTC)
demo-finding-rubygems	🔄 Building (Inspect)		Jan 31, 2023 at 3:31PM (UTC)
demo-geo-javascript	🔄 Building (Inspect)		Jan 31, 2023 at 3:31PM (UTC)
demo-matching-strategy	🔄 Building (Inspect)		Jan 31, 2023 at 3:31PM (UTC)
demo-moma	🔄 Building (Inspect)		Jan 31, 2023 at 3:31PM (UTC)
demo-nobel-prizes	🔄 Building (Inspect)		Jan 31, 2023 at 3:31PM (UTC)
demo-numbered-pagination	🔄 Building (Inspect)		Jan 31, 2023 at 3:31PM (UTC)
demo-tenant-token	🔄 Building (Inspect)		Jan 31, 2023 at 3:31PM (UTC)
demo-typo-tolerance	🔄 Building (Inspect)		Jan 31, 2023 at 3:31PM (UTC)