New translations config.yaml (Japanese)

Author: rgommers

content/ja/config.yaml

@@ -10,7 +10,7 @@ params:
     #Hero subtitle (optional)
     subtitle: Pythonによる科学技術計算の基礎パッケージ
     #Button text
-    buttontext: "使い始める"
+    buttontext: "Latest release: NumPy 1.25. View all releases"
     #Where the main hero button links to
     buttonlink: "/ja/install"
     #Hero image (from static/images/___)