fixed the "learn how this is implemented" link inside of the mastodon… (#894)

….html file

### Prerequisites

Put an `x` into the box(es) that apply:

- [ x] This pull request fixes a bug.
- [ ] This pull request adds a feature.
- [ ] This pull request introduces breaking change.

### Description

Fixed the issue inside of mastodon.html file where the "Learn how this
is implemented" link does not work.

### Issues Resolved

Fixed the issue inside of mastodon.html file where the "Learn how this
is implemented" link does not work.

### Checklist

Put an `x` into the box(es) that apply:

#### General

- [x] Describe what changes are being made
- [x] Explain why and how the changes were necessary and implemented
respectively
- [ ] Reference issue with `#<ISSUE_NO>` if applicable

#### Resources

- [ ] If you have changed any SCSS code, run `make release` to
regenerate all CSS files

#### Contributors

- [ ] Add yourself to `CONTRIBUTORS.md` if you aren't on it already

Co-authored-by: Nicolas Prothero <“nprothero0917@gmail.comgit config --global user.name “Nicolas Prothero>

layouts/partials/posts/mastodon.html

@@ -1,7 +1,7 @@
 {{ with .Params.comments }}
   <div class="article-content">
     <h2>Comments</h2>
-    <p>You can use your Mastodon account to reply to this <a class="link" href="https://{{ .host }}/@{{ .username }}/{{ .id }}">post</a>. Learn how this is implemented <a class="link" href="/2020/12/29/adding-comments-to-your-static-blog-with-mastodon/">here.</a></p>
+    <p>You can use your Mastodon account to reply to this <a class="link" href="https://{{ .host }}/@{{ .username }}/{{ .id }}">post</a>. Learn how this is implemented <a class="link" href="https://carlschwan.eu/2020/12/29/adding-comments-to-your-static-blog-with-mastodon/">here.</a></p>
     <p><button id="replyButton" href="https://{{ .host }}/@{{ .username }}/{{ .id }}">Reply</button></p>
     <p id="mastodon-comments-list"><button id="load-comment">Load comments</button></p>
     <dialog id="toot-reply" class="mastodon" data-component="dialog">