Update URLs for link tag generator page

[huijing]

Closes #320 (putting this here to link to issue)

We have implemented the redirect from /meta-tag to /link-tag on Cloudflare (please verify by visiting https://webmonetization.org/meta-tag/). This PR is part of the cleanup task and:

• removes meta-tag.js
• updates the links to /meta-tag to use /link-tag instead

[sublimator]

Not using actual redirection ?

The page url just stays on https://webmonetization.org/meta-tag/

[sublimator]

href="$YourPaymentPointer" />

Note also that actual payment pointers start with a $ Link tags accept only well formed urls It might pay to have the initial examples/placeholders correct

[huijing]

Not using actual redirection ? The page url just stays on https://webmonetization.org/meta-tag/

Ah, made a typo on the redirect rule up on Cloudflare. It's corrected now.

[sublimator]

Just testing if anyone awake :) ?