Add citation block

README.md

@@ -185,7 +185,7 @@ condition, not a courtesy.
 
 ```bibtex
 @misc{swift_tickets_2026,
-  author       = {Seneviratne, Sithija},
+  author       = {Seneviratne, Sithija and Sutharsan, Ruththiragayan and Shaheed, Shazan},
   title        = {Swift Support Tickets: A Multilingual Ticket-Triage Corpus for Sinhala,
                   Tamil and English, Including Romanized Code-Mixed Text},
   year         = {2026},
@@ -200,7 +200,7 @@ condition, not a courtesy.
 
 ```bibtex
 @misc{swift_models_2026,
-  author       = {Seneviratne, Sithija},
+  author       = {Seneviratne, Sithija and Sutharsan, Ruththiragayan and Shaheed, Shazan},
   title        = {Swift: Multilingual Baselines for Support-Ticket Triage in Sinhala,
                   Tamil and English},
   year         = {2026},