remove unwanted updating of source-position in app set command (#18887)…

… (#18897)

Signed-off-by: ishitasequeira <ishiseq29@gmail.com>
Co-authored-by: Ishita Sequeira <46771830+ishitasequeira@users.noreply.github.com>

cmd/argocd/commands/app.go

@@ -776,8 +776,6 @@ func NewApplicationSetCommand(clientOpts *argocdclient.ClientOptions) *cobra.Com
 				}
 			}
 
-			// sourcePosition startes with 1, thus, it needs to be decreased by 1 to find the correct index in the list of sources
-			sourcePosition = sourcePosition - 1
 			visited := cmdutil.SetAppSpecOptions(c.Flags(), &app.Spec, &appOpts, sourcePosition)
 			if visited == 0 {
 				log.Error("Please set at least one option to update")