Spell as SHA-3 not SHA3

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/ChangeLog.d/sha3.txt b/ChangeLog.d/sha3.txt
index dafff74..9426f87 100644
--- a/ChangeLog.d/sha3.txt
+++ b/ChangeLog.d/sha3.txt
@@ -1,3 +1,3 @@
 Features
-    * Add SHA3 family hash functions.
+    * Add SHA-3 family hash functions.