Minor punctuation fix

Author: InessaPawson

content/en/config.yaml

@@ -10,7 +10,7 @@ params:
     # Hero subtitle (optional)
     subtitle: The fundamental package for scientific computing with Python
     # Button text
-    buttontext: "Latest release: NumPy 1.25. View all releases."
+    buttontext: "Latest release: NumPy 1.25. View all releases"
     # Where the main hero button links to
     buttonlink: "/news/#releases"
     # Hero image (from static/images/___)