Update continuous-integration.mdx (#13129)

fixed typo in a sentence in the troubleshooting section

Author: yuvmen

develop-docs/development-infrastructure/continuous-integration.mdx

@@ -32,7 +32,7 @@ You might also be interested in <Link to="/development/environment/#troubleshoot
 
 **Problem:**
 
-When pushing your build to staging and you it fails the `Ensure test image` step on Travis.
+When pushing your build to staging and it fails the `Ensure test image` step on Travis.
 
 **Solution:**