Update v1.2_build_guide.md

v1.2/v1.2_build_guide.md

@@ -3,7 +3,7 @@ This page will walk you through the complete process of assembling a glyph v1.2.
 Let's start with everything you'll need:
 
 - printed parts: bottom and top case, foot, plate and pico clip
-- 3D pen recommended (soldering iron can also work but is more messy)
+- 3D pen is recommended (soldering iron can also work but is more messy)
 - 8x M2,5 threaded inserts <10mm length
 - 8x M2,5x12mm countersunk screws, DIN7991 or similar
 - rubber feet, ⌀20x>2mm, [example](https://www.aliexpress.com/item/1005004003601545.html)