update docs

Signed-off-by: Nannie_wangli <annie.wangli@huawei.com>

en/application-dev/security/hapsigntool-guidelines.md

@@ -65,9 +65,9 @@ The OpenHarmony system has a built-in KeyStore (KS) file named **OpenHarmony.p12
 
 The usage of hapsigner varies depending on whether an application signing certificate is available. 
 
-- If no application signing certificate is available:
+- If no application signing certificate is available:<br/>
   You need to generate a key pair, generate an application signing certificate, sign the profile, and sign the application.
-- If an application signing certification is available:
+- If an application signing certification is available:<br/>
   You need to sign the profile, and use the application signing certificate and the local KS file (containing the corresponding key) to sign the application.
 
 ### Usage
@@ -353,9 +353,6 @@ The command parameters are described as follows:
          ├── -keystorePwd      # KS password, which must be the actual KS password. 
 
 
-
-
-
 ## FAQs
 
 **1. When the application signing certificate is generated, the console displays the result but no file is output.**