Update communication options with geonetwork-ui user forum

[jodygarnett]

Description

This PR introduces user forum, and slightly rewords the introduction (sorry!).

Screenshots

Quality Assurance Checklist

• Commit history is devoid of any merge commits and readable to facilitate reviews
• If new logic ⚙️ is introduced: unit tests were added
• If new user stories 🤏 are introduced: E2E tests were added
• If new UI components 🕹️ are introduced: corresponding stories in Storybook were created
• If breaking changes 🪚 are introduced: add the breaking change label
• If bugs 🐞 are fixed: add the backport <release branch> label
• The documentation website 📚 has received the love it deserves

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This user forum is provided by Open Source Geospatial Foundation because they love you.

[github-actions]

Affected libs: , Affected apps: ,

• 🚀 Build and deploy storybook and demo on GitHub Pages
• 📦 Build and push affected docker images

[jodygarnett]

To be honest I am sure the docs could use a link to the user forum also :)

[github-actions]

📷 Screenshots are here!

[jodygarnett]

📷 Screenshots are here!

What is up little bot? You should have your workflow modified a bit so you only trigger on specific folders

[jahow]

Thank you!! I'll also mention this on the docs website