Update covid19.html

spelling correction

Author: emiliom

jekyll-spectral-theme/_includes/covid19.html

@@ -4,7 +4,7 @@
 			<h2>Coronavirus (COVID-19) Contingency</h2>
 			<p>
 				We are monitoring the COVID-19 situation and will make a decision by late May about whether to proceed with 
-				the event in mid August, as planned, or postpone to January 2021. If it is postpone,
+				the event in mid August, as planned, or postpone to January 2021. If it is postponed,
 				OceanHackweek West may be moved to San Diego.
 
 				To stay up to date on the current impact of the coronavirus emergency and government recommendations,