Revise blurb for Enthymeme task description

Updated blurb to provide a clearer and more detailed explanation of the task's focus on identifying implicit arguments in social media posts.

Author: cmihaigabriel

_editions/2026/tasks/enthymeme.md

@@ -7,8 +7,7 @@ hide: false
 # required info
 title: "Missing Pieces and Misinformation: Identifying social media posts with implicit messages (pilot task)"
 subtitle: Enthymeme
-blurb: "This task will release a data set of social media posts annotated with information about the type of arguments they contain. Specifically, the task is focused on identifying arguments arguments with implicit 
-premises or conclusions."
+blurb: "Missing Pieces and Misinformation: Identifying social media posts with implicit messages (pilot task). Participants receive a collection of controversial social media posts (tweets) and must detect arguments with implicit premises or conclusions. Such arguments are known as “enthymemes” and can be a strategy for disseminating misinformation. Participants also explore the implications of variations in the human generated ground truth."
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