updated the first sentence of the readmefile (added the words "which is" to make it sound correctly) (#924)

* updated the first sentence of the readmefile

* updated the first sentence of readme file

Author: Diksha4248

README.md

@@ -12,7 +12,7 @@
 
 # Web Development for Beginners - A Curriculum
 
-Azure Cloud Advocates at Microsoft are pleased to offer a 12-week, 24-lesson curriculum all about JavaScript, CSS, and HTML basics. Each lesson includes pre- and post-lesson quizzes, written instructions to complete the lesson, a solution, an assignment and more. Our project-based pedagogy allows you to learn while building, a proven way for new skills to 'stick'.
+Azure Cloud Advocates at Microsoft are pleased to offer a 12-week, 24-lesson curriculum which is all about JavaScript, CSS, and HTML basics. Each lesson includes pre- and post-lesson quizzes, written instructions to complete the lesson, a solution, an assignment and more. Our project-based pedagogy allows you to learn while building, a proven way for new skills to 'stick'.
 
 **Hearty thanks to our authors Jen Looper, Chris Noring, Christopher Harrison, Jasmine Greenaway, Yohan Lasorsa, Floor Drees, and sketchnote artist Tomomi Imura!**