changed chain specs link for alphanet relay

[ibbar]

Description

changed chain specs link for alphanet relay

Checklist

• I have added a label to this PR 🏷️
• I have run my changes through Grammarly
• If this requires translations for the moonbeam-docs-cn repo, I have created a ticket for the translations in Jira
• If pages have been moved around, I have created an additional PR in moonbeam-mkdocs to update redirects
• If pages have been moved around, I have run the move-pages.py script to move the pages and update the image paths on the chinese repo
  • After the script has been run, I have created an additional PR in moonbeam-docs-cn
• If images have been added, I have run the compress-images.py script to compress the images.
• If variables (in variables.yml) need to be updated (such as a name change), I have updated the moonbeam-docs-cn repo to use the new variables
• If this page requires a disclaimer, I have added one

Corresponding PRs

Please link to any corresponding PRs here.

After Translation Requirements

• Will need to create PR in moonbeam-docs repo to remove images
• Will need to create PR in moonbeam-docs repo to remove variables
• Will need to create PR in moonbeam-mkdocs repo to add redirects for Chinese site
• No additional PRs are required after the translations are done

Items to be Updated

Please list any of the items that will need to be added or deleted after the translations are done here.

[themacexpert]

Looks like Prettier messed up the notes in this file. Can you add back the prior spacing for each of the note sections?

[albertov19]

@ibbar we need to create a prettier ignore file in your environment so that Prettier does not mess up with our formatting

[themacexpert]

@ibbar When you have a chance you can also add Label (A3/A2/A1/A0 based on content) to the PR and you can add the Needs Review flag as well.