fix(clippy): use derive for Default impl on OutputFormat

Rust 1.91 introduced a new lint 'derivable_impls' that flags manual
Default implementations that can be derived. Changed OutputFormat to
use #[derive(Default)] with #[default] attribute on the Json variant.

Fixes CI clippy failure on Rust 1.91.0.

Author: joshrotenberg

crates/redisctl/src/output.rs

@@ -6,19 +6,14 @@ use jmespath::compile;
 use serde::Serialize;
 use serde_json::Value;
 
-#[derive(Debug, Clone, Copy, clap::ValueEnum)]
+#[derive(Debug, Clone, Copy, clap::ValueEnum, Default)]
 pub enum OutputFormat {
+    #[default]
     Json,
     Yaml,
     Table,
 }
 
-impl Default for OutputFormat {
-    fn default() -> Self {
-        Self::Json
-    }
-}
-
 impl OutputFormat {
     pub fn is_json(&self) -> bool {
         matches!(self, Self::Json)