fix Vale error with words with bold first letters

README.md

@@ -31,6 +31,10 @@ I help developers be successful by nurturing a healthy and welcoming community a
 
 ![The foundation of devrel explained in the next paragraph](img/devrel-3Cs.svg)
 
-The three pillars of Developer Relations are **C**ommunity, **C**ontent, and **C**ode, also known as the 3Cs*. The main focus of our team is the community: just read our mission to understand that everything we do is for our developer community. To help us achieve our mission, we use two main activities: content and code. The former is any type of content on any useful medium; some examples are talks at conferences, the developer documentation, or video tutorials. The latter, code, is part of the foundation of who we are: we are developers. It translates into code examples for the documentation, code demos for our conference presentations, technical support, demo applications, or even being responsible for specific APIs or contributing to open source to give back to the community and be a good web citizen. All together, they form the foundation of developer relations.
+<!-- vale Custom.spelling = NO -->
+The three pillars of Developer Relations are **C**ommunity, **C**ontent, and **C**ode, also known as the 3Cs*.
+<!-- vale Custom.spelling = YES -->
+
+The main focus of our team is the community: just read our mission to understand that everything we do is for our developer community. To help us achieve our mission, we use two main activities: content and code. The former is any type of content on any useful medium; some examples are talks at conferences, the developer documentation, or video tutorials. The latter, code, is part of the foundation of who we are: we are developers. It translates into code examples for the documentation, code demos for our conference presentations, technical support, demo applications, or even being responsible for specific APIs or contributing to open source to give back to the community and be a good web citizen. All together, they form the foundation of developer relations.
 
 \* _adapted from [SendGrid 2014 article](https://sendgrid.com/blog/3-cs-developer-relations/)_