fix: edit validator bug from the cli (#10684)

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## Description

Closes: #10660 

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### Author Checklist

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- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
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- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
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### Reviewers Checklist

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- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
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- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

x/staking/client/cli/flags.go

@@ -16,6 +16,7 @@ const (
 	FlagSharesFraction      = "shares-fraction"
 
 	FlagMoniker         = "moniker"
+	FlagEditMoniker     = "new-moniker"
 	FlagIdentity        = "identity"
 	FlagWebsite         = "website"
 	FlagSecurityContact = "security-contact"
@@ -82,7 +83,7 @@ func FlagSetPublicKey() *flag.FlagSet {
 func flagSetDescriptionEdit() *flag.FlagSet {
 	fs := flag.NewFlagSet("", flag.ContinueOnError)
 
-	fs.String(FlagMoniker, types.DoNotModifyDesc, "The validator's name")
+	fs.String(FlagEditMoniker, types.DoNotModifyDesc, "The validator's name")
 	fs.String(FlagIdentity, types.DoNotModifyDesc, "The (optional) identity signature (ex. UPort or Keybase)")
 	fs.String(FlagWebsite, types.DoNotModifyDesc, "The validator's (optional) website")
 	fs.String(FlagSecurityContact, types.DoNotModifyDesc, "The validator's (optional) security contact email")

x/staking/client/cli/tx.go

@@ -98,7 +98,7 @@ func NewEditValidatorCmd() *cobra.Command {
 				return err
 			}
 			valAddr := clientCtx.GetFromAddress()
-			moniker, _ := cmd.Flags().GetString(FlagMoniker)
+			moniker, _ := cmd.Flags().GetString(FlagEditMoniker)
 			identity, _ := cmd.Flags().GetString(FlagIdentity)
 			website, _ := cmd.Flags().GetString(FlagWebsite)
 			security, _ := cmd.Flags().GetString(FlagSecurityContact)