Update submission date for SoMoS 2026 conference

Author: xserra

_conferences/2026-somos-2026.md

@@ -3,7 +3,7 @@ title: Fourth Symposium of the ICTMD Study Group on Sound, Movement, and the Sci
 acronym: SoMoS 2026
 date: '2026-09-23' # Conference date. Ensure mm and dd are 2 digits
 end_date: '2026-09-26' # Conference end date, leave empty if unknown
-submission_date: '2026-02-27' # Date of submissions
+submission_date: '2026-03-13' # Date of submissions
 ext_url: https://ictmusic.org/studygroup/somos/post/call-papers-4th-symposium-ictmd-somos # External URL to conference website
 location: Lisbon, Portugal # City, Country
 ---