change capitalization to match actual name in code

diff --git a/docs/util.md b/docs/util.md
index ee3b325bfd8f7adc769492fd017ce5f0eadaecae..39c2f86a0332b0dbeceaead0eb254c64a5344840 100644 (file)
--- a/docs/util.md
+++ b/docs/util.md
@@ -1,4 +1,4 @@
-# Util library
+# util library
 
 ## `util/bit_intrinsics.h`