Add a little heading to the weblogpomo posts

src/_includes/weblogpomo.njk

@@ -0,0 +1,9 @@
+---
+layout: post.njk
+---
+
+<aside class="callout">
+    This post was part of <a href="https://weblog.anniegreens.lol/weblog-posting-month-2024" target="_blank" rel="noopener noreferrer">#WeblogPoMo2024</a>. The rest of the post are on the <a href="/post/tag/WeblogPoMo2024">tag page</a>.
+</aside>
+
+{{content|safe}}

src/blog/posts/2024/5/5.11tydata.json

@@ -1,3 +1,4 @@
 {
-    "tags": ["WeblogPoMo2024"]
+    "tags": ["WeblogPoMo2024"],
+    "layout": "weblogpomo.njk"
 }

src/blog/posts/2024/5/weblogpomo2024-retrospective.md

@@ -1,13 +1,13 @@
 ---json
 {
-  "title": "#WeBlogPoMo2024 retrospective",
+  "title": "#WeblogPoMo2024 retrospective",
   "date": "2024-05-31T08:00:52.945Z",
   "tags": [],
-  "excerpt": "A quick look back at WeBlogPoMo2024 on the last day"
+  "excerpt": "A quick look back at WeblogPoMo2024 on the last day"
 }
 ---
 
-It's the last day of [#WeBlogPoMo2024](/post/tag/WeblogPoMo2024), so I thought I'd take a quick look back at the month and see how it has gone.
+It's the last day of [#WeblogPoMo2024](/post/tag/WeblogPoMo2024), so I thought I'd take a quick look back at the month and see how it has gone.
 
 Overall, I'm kind of impressed I'm even writing a post on the last day. Honestly, I expected to maybe manage the first 7-or-so days, but in fact I managed to write 19 consecutive blog posts (and that's not counting the [intro post](/post/weblogpomo-2024/) on the 30th of April). In total, including today, I managed to write a post 25/31 days. I'm calling that a success.