Add gif image on README (#2)

sh1doy · web-flow · commit aaae37c66644 · 2023-04-24T16:01:15.000+09:00
diff --git a/README.md b/README.md
@@ -1 +1,5 @@
-# github-version-bumper
+# github-version-bumper
+
+No more manual bump ✊
+
+![bumping](https://user-images.githubusercontent.com/24380446/233918922-00c7800c-56fd-417a-91f2-6c67daee4414.gif)
