[docs] Use consistent formatting for headers

docs/videos.it-IT.md

@@ -29,7 +29,7 @@ Un video di [tagtree.tv](http://tagtree.tv/) che espone i principi di [Pensare i
 
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-### Pensare in grande con React ###
+### Pensare in grande con React
 
 "Sulla carta, tutti questi framework JS sembrano promettenti: implementazioni pulite, design veloce del codice, esecuzione perfetta. Ma che succede quando metti Javascript sotto stress? Che succede se gli dài in pasto 6 megabyte di codice? In questo talk investigheremo come si comporta React in situazioni di stress elevato, e come ha aiutato il nostro team a costruire codice sicuro ad una scala enorme."
 <figure>[![](https://i.vimeocdn.com/video/481670116_650.jpg)](https://skillsmatter.com/skillscasts/5429-going-big-with-react#video)</figure>

docs/videos.md

@@ -29,7 +29,7 @@ A [tagtree.tv](http://tagtree.tv/) video conveying the principles of [Thinking i
 
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-### Going big with React ###
+### Going big with React
 
 "On paper, all those JS frameworks look promising: clean implementations, quick code design, flawless execution. But what happens when you stress test Javascript? What happens when you throw 6 megabytes of code at it? In this talk, we'll investigate how React performs in a high stress situation, and how it has helped our team build safe code on a massive scale."
 <figure>[![](https://i.vimeocdn.com/video/481670116_650.jpg)](https://skillsmatter.com/skillscasts/5429-going-big-with-react#video)</figure>

docs/videos.zh-CN.md

@@ -29,7 +29,7 @@ next: complementary-tools-zh-CN.html
 
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-### Going big with React ###
+### Going big with React
 
 "理论上，所有的JS框架都大有可为：干净的实现,快速的代码设计,完美的执行。但是当你压力测试时Javascript会怎样？当你丢进6MB的代码时会怎样？在这次演讲中，我们会探究React在高压环境下如何表现，以及它如何帮助我们的团队在大规模时构建安全代码。 "
 <figure>[![](https://i.vimeocdn.com/video/481670116_650.jpg)](https://skillsmatter.com/skillscasts/5429-going-big-with-react#video)</figure>