Fix the highlight for the tech section

Change-Id: I4a8fe3d99e8d58f8e21bb11ec4cf502bc4548cce
diff --git a/src/assets/main.css b/src/assets/main.css
index 1a089e2..59f2dd1 100644
--- a/src/assets/main.css
+++ b/src/assets/main.css
@@ -102,7 +102,7 @@
 /* tab highlighting */
 .home #home-link a,
 .community #community-link a,
-.porting #porting-link a,
+.tech #tech-link a,
 .source #source-link a,
 .about #about-link a,
 .compatibility #compatibility-link a {