Update README.md

There is a typo in the heading “What is front end developer”, it should be “What is a front-end developer” and the sentence “How the Internet Travel Across Oceans?”, the word “Travel” should be “Travels” to make the sentence “How the Internet Travels Across Oceans?”

Frontend-Development/README.md

@@ -2,7 +2,7 @@
 
 ## Introduction
 
-### What is front end developer
+### What is front-end developer
 
 - [What is a frontend developer? - frontendmasters.com](https://frontendmasters.com/guides/front-end-handbook/2018/what-is-a-FD.html)
 - [Frontend web developer - Mozilla Developer docs](https://developer.mozilla.org/en-US/docs/Learn/Front-end_web_developer)
@@ -15,10 +15,10 @@
 
 ## Understanding Internet
 
-### How does internet work
+### How does the internet work
 
 - [Computer Networking course - Kunal Kushwaha(Youtube)](https://www.youtube.com/watch?v=IPvYjXCsTg8)
-- [How the Internet Travel Across Oceans? - TechVision(Youtube)](https://www.youtube.com/watch?v=yd1JhZzoS6A)
+- [How the Internet Travels Across Oceans? - TechVision(Youtube)](https://www.youtube.com/watch?v=yd1JhZzoS6A)
 - [How does the Internet Work? - Vox(Youtube)](https://www.youtube.com/watch?v=TNQsmPf24go)
 - [How does the Internet Work? - Mozilla web docs](https://developer.mozilla.org/en-US/docs/Learn/Common_questions/How_does_the_Internet_work)
 - [How Does the Internet Work? - Stanford.edu](https://web.stanford.edu/class/msande91si/www-spr04/readings/week1/InternetWhitepaper.htm)