small fixes

Author: llpeterson

authors.rst

@@ -27,7 +27,7 @@ Networking Foundation (ONF) engineering team that built Aether,
 leading the observability effort. Bavier has also been a Research
 Scientist at Princeton University, where he worked on the PlanetLab
 project. He received a BA in Philosophy from William & Mary in 1990,
-and MS in Computer Science from the University of Arizona in 1995, and
+an MS in Computer Science from the University of Arizona in 1995, and
 a PhD in Computer Science from Princeton University in 2004.
 
 **Zack Williams** is a Cloud Software Engineer at Intel, where he

preface.rst

@@ -135,5 +135,5 @@ to this book. Please send us your comments using the `Issues Link
 Request with suggested changes.
 
 | Larry Peterson, Scott Baker, Andy Bavier, Zack Williams, and Bruce Davie
-| April 2025
+| June 2025