Fix markdown inside <details> blocks

_config.yml

@@ -0,0 +1,6 @@
+---
+# See <https://github.com/jekyll/jekyll/issues/9297#issuecomment-2137865682>
+# for why we use kramdown.
+markdown: kramdown
+kramdown:
+  parse_block_html: true

publications/mwis2024.md

@@ -57,7 +57,7 @@ The groups are selected based on the number of nodes in the problem instances.
 More information are presented in the paper.
 
 <details>
-<summary>Group mapping in JSON format</summary>
+<summary markdown="span">Group mapping in JSON format</summary>
 
 ```json
 {
@@ -139,8 +139,8 @@ The AVR problem instances have been original obtained from the [Amazon MWIS VR D
 The problem instances have been used as is.
 We converted the text file representation into our JSON clique graph format as well as into the Metis edge graph format.
 
-<details>
-<summary>Mapping of instance number to original instance name as JSON</summary>
+<detail>
+<summary markdown="span">Mapping of instance number to original instance name as JSON</summary>
 
 ```json
 {