Update cp-regions.md to remove beta from Singapore region (#3747)

Author: smritikjaggi

app/_includes/sections/cp-regions.md

@@ -7,7 +7,7 @@
 * ME (Middle East)
 * US (United States)
 * IN (India)
-* SG (Singapore) (beta)
+* SG (Singapore)
 
   {:.info}
   > **Note:** A {{site.konnect_short_name}} org admin must opt-in to the Singapore region by selecting the geo in the region picker and then opting in.