Fix sprints pages.

Author: rodrigogiraoserrao

src/content/sprints/beeware.md

@@ -4,7 +4,7 @@ numberOfPeople: "TBA"
 pythonLevel: "Beginner"
 contactPerson:
   name: "Russell Keith-Magee"
-  email: ""
+  email: "name@example.com"
 links:
   - title: "BeeWare GitHub"
     url: "https://github.com/beeware"

src/content/sprints/cpython.md

@@ -4,7 +4,7 @@ numberOfPeople: "TBA"
 pythonLevel: "Intermediate"
 contactPerson:
   name: "Petr Viktorin"
-  email: ""
+  email: "name@example.com"
 links:
   - title: "Code of Conduct"
     url: "https://www.python.org/psf/conduct/"