Fix format

Author: wchen-r7

documentation/modules/auxiliary/scanner/http/http_login.md

@@ -11,7 +11,7 @@ This module is a brute-force login scanner that attempts to authenticate to a sy
 
 ## Scenarios
 
-### Running the scanner :
+**Running the scanner**
 
 ```
 msf > use auxiliary/scanner/http/http_login
@@ -57,7 +57,7 @@ msf auxiliary(http_login) > run
 msf auxiliary(http_login) >
 ```
 
-### Checking the credentials stored :
+**Checking the credentials stored**
 
 ```
 msf auxiliary(http_login) > creds