clarify file for checksig command

#DOC-1622 RS:make the filename clear for the rpm --checksig command step

Author: mich-elle-luna

content/operate/rs/installing-upgrading/install/install-on-linux.md

@@ -45,7 +45,7 @@ To install Redis Enterprise Software, use the command line:
         ```
         2. Verify the package signature:  
          ```sh
-         rpm --checksig <path to installation package>
+         rpm --checksig <package.rpm>
          ```
 
 1. To start the installation process, run the installation script. See [installation script options]({{< relref "/operate/rs/installing-upgrading/install/install-script" >}}) for a list of command-line options you can add to the following command: