extend help text (#449)

## Fixes
<!-- List the issue(s) this PR resolves -->
#448

## Changes
<!-- List the changes this PR introduces -->
- extend help text for clarity.

## Checklist
<!-- Put an `x` in the boxes. All tasks must be completed and boxes
checked before merging. -->
- [x] 🤖 This change is covered by unit tests (if applicable).
- [x] 🤹 Manual testing has been performed (if necessary).
- [x] 🛡️ Security impacts have been considered (if relevant).
- [x] 📖 Documentation updates are complete (if required).
- [x] 🧠 Third-party dependencies and TPIP updated (if required).

Author: jkrech

README.md

@@ -51,7 +51,7 @@ Flags:
                                     Specify "-q" for no messages
   -V, --version                     Prints the version number of cpackget and exit
 
-Use "cpackget [command] --help" for more information about a command.
+Use "cpackget [command] --help" for more information about a command and command-specific flags.
 ```
 
 For example, if one wanted help removing a pack, running `cpackget rm --help` would print out useful information on the subject.

cmd/commands/root.go

@@ -141,7 +141,7 @@ Global Flags:
 Additional help topics:{{range .Commands}}{{if .IsAdditionalHelpTopicCommand}}
   {{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableSubCommands}}
 
-Use "{{.CommandPath}} [command] --help" for more information about a command.{{end}}
+Use "{{.CommandPath}} [command] --help" for more information about a command and command-specific flags.{{end}}
 `
 
 func NewCli() *cobra.Command {