Update README.md

Author: ArtiomL

README.md

@@ -24,7 +24,7 @@ Automated TLS/SSL server tests for multiple hosts using the [SSL Labs](https://w
 
 The code in this repository allows you to scan a list of public TLS/SSL web servers for certificate issues, protocol and cipher suite support, crypto vulnerabilities [etc](https://www.ssllabs.com/downloads/SSL_Server_Rating_Guide.pdf).
 
-Running (*up to* **5**) concurrent assessments is supported (`-s`), but please keep down the number of concurrent assessments to a minimum. If you're not in a hurry, test only one hostname at a time (default).
+Running (*up to* **_5_**) concurrent assessments is supported (`-s`), but please keep down the number of concurrent assessments to a minimum. If you're not in a hurry, test only one hostname at a time (default).
 
 The grade report can then be sent by mail (`-m`) or written to **_stdout_**.