yaml update for mma (#21)

Getting the YAML structured in the same way as other modules...also adding a thumbnail

Author: iramler

mixed_martial_arts/mma_interrater_reliability/clipart-matial-mixed-martial-arts.png

@@ -1,6 +1,23 @@
 ---
 title: "MMA Inter-rater Reliability Data Analysis"
-authors: "Caleb Skinner; Joshua Patrick, PhD; Connor Bryson; Rodney X. Sturdivant, PhD "
+author:
+  - name: Caleb Skinner
+    email: cs222@rice.edu
+    affiliation:
+      - id: rice
+        name: Rice University
+  - name: Joshua Patrick, PhD
+    affiliation:
+      - id: baylor
+        name: Baylor University
+  - name: Rodney X. Sturdivant, PhD
+    affiliation:
+      - ref: baylor
+date: "June 16, 2025"
+image: clipart-matial-mixed-martial-arts.png
+categories:
+  - Inter-rater Reliability
+description: "Explore statistics used to measure judges’ consistency and reliability and apply them to judging of MMA fights."
 format:
   html:
     theme: cosmo