Update README.md

Author: jin519

README.md

@@ -7,4 +7,4 @@
 👀 <a href="./md/static_assert.md">static_assert</a> <br>
 👀 <a href="./md/rvalue_reference.md">rvalue reference & forwarding reference</a> <br>
 👀 <a href="./md/volatile.md">volatile</a> <br>
-👀 <a href="./md/function.md">function</a>
+👀 <a href="./md/function.md">function handling</a>