misc: fix typos in introduction (#253)

* Fix minor spelling mistake

* Fix typo

contents/introduction.md

@@ -13,6 +13,6 @@ This repository has **practical** content that covers all phases of a technical
 
 ## Who is this for?
 
-Whether you are a beginner to technical interviews or a seasoned engineer who have not been on the other side of the interviewing table in a while and want to get back into the game, the Tech Interview Handbook has got you covered.
+Whether you are a beginner to technical interviews or a seasoned engineer who has not been on the other side of the interviewing table in a while and want to get back into the game, the Tech Interview Handbook has got you covered.
 
 If you are a busy engineer like most people are, this resource is for you. Nobody has time to do hundreds of LeetCode questions, and the good news is that you don't need to do that many to actually get the job at FAANG! We have hundreds of LeetCode questions and distilled the best questions to practice.

contents/resume.md

@@ -143,7 +143,7 @@ If you have some space on your resume, it is good to list additional interests o
 If you are applying to foreign countries, it'd help to customize your resume to make it easier for recruiters of that country to understand your resume. For example, you can do the following for US roles:
 
 - If you're interning, expected year of graduation (month as well if you know) because some places only want to hire interns who are graduating soon
-- Mention work eligibility. This is straightforward for Singaporeans (mention eligibility for for H-1B1 visa)
+- Mention work eligibility. This is straightforward for Singaporeans (mention eligibility for H-1B1 visa)
 - Convert your grades to a GPA out of 5 and mention whether it's First Class Honors/Summa Cum Laude
 
 ###### References