Update dry-run description message

Author: lfir

README.md

@@ -19,6 +19,8 @@ It also sets some configuration options useful for development work and system a
   ./mvnw test
   ```
 
+Both should be used as a non-root user. The app invokes _sudo_ as needed.
+
 #### Notes
 
 - Free useful apps available in a portable format (i.e. AppImage)

src/main/java/cf/maybelambda/fedora/PostInstallUpdater.java

@@ -46,7 +46,7 @@ public static void main(String[] args) {
 
         System.out.println("Fedora Post Install Actions\n");
         if (isDryRun()) {
-            System.out.println("---[Dry Run Mode] Commands will not be executed.---\n");
+            System.out.println("---[Dry Run Mode] Shell Commands will not be executed.---\n");
         }
 
         // 1. Install RPMFusion repos