Blog anchor links in paginated lists should be resolved against blog post url, not current url

[afunkliru]

Have you read the Contributing Guidelines on issues?

• [X] I have read the Contributing Guidelines on issues.

Prerequisites

• [X] I'm using the latest version of Docusaurus.
• [X] I have tried the npm run clear or yarn clear command.
• [X] I have tried rm -rf node_modules yarn.lock package-lock.json and re-installing packages.
• [X] I have tried creating a repro with https://new.docusaurus.io.
• [X] I have read the console error message carefully (if applicable).

Description

Anchor tags shown on an entry of https://docusaurus.io/blog, doesn't go to the entry page's anchor tag. It goes to the https://docusaurus.io/blog#ANCHOR-TAG.

Reproducible demo

No response

Steps to reproduce

1. go to https://docusaurus.io/blog with a description that links to an anchor tag on the entry's page
2. Click on anchor tag in the entry page's one-liner description above the truncate line.
3. Goes to broken link.

Expected behavior

Expect to go to the entry page's anchor, not to stay on the blog's home page.

Actual behavior

Stays on blog's home page.

Your environment

• Public source code:
• Public site URL:
• Docusaurus version used:
• Environment name and version (e.g. Chrome 89, Node.js 16.4):
• Operating system and version (e.g. Ubuntu 20.04.2 LTS):

Self-service

• [ ] I'd be willing to fix this bug myself.