Fixed typo in release notes.

amks1 · wang0618 · commit fcbbe3696a12 · 2023-04-12T12:07:18.000+08:00
diff --git a/docs/releases/v1.8.rst b/docs/releases/v1.8.rst
@@ -1,7 +1,7 @@
 What's new in PyWebIO 1.8
 ==========================
 
-2022/4/10
+2023/4/10
 ----------
 
 Highlights
