fix typo in pulumi stack cli docs
@@ -43,7 +43,7 @@ func newStackCmd() *cobra.Command {
Short: "Manage stacks",
Long: "Manage stacks\n" +
"\n" +
- "An stack is a named update target, and a single project may have many of them.\n" +
+ "A stack is a named update target, and a single project may have many of them.\n" +
"Each stack has a configuration and update history associated with it, stored in\n" +
"the workspace, in addition to a full checkpoint of the last known good update.\n",
Args: cmdutil.NoArgs,
