Fix: init-config command of validator-history-cli (#89)

#### Motivation
Currently, has an error when we want to initialize config by
`validator-history-cli` .

```
Command init-config: Short option names must be unique for each argument, but '-t' is in use by both 'tip_distribution_program_id' and 'tip_distribution_authority
```

#### Solution
- Remove short option.

utils/validator-history-cli/src/main.rs

@@ -50,13 +50,13 @@ struct InitConfig {
     keypair_path: PathBuf,
 
     /// Tip distribution program ID (Pubkey as base58 string)
-    #[arg(short, long, env)]
+    #[arg(long, env)]
     tip_distribution_program_id: Pubkey,
 
     /// New tip distribution authority (Pubkey as base58 string)
     ///
     /// If not provided, the initial keypair will be the authority
-    #[arg(short, long, env, required(false))]
+    #[arg(long, env, required(false))]
     tip_distribution_authority: Option<Pubkey>,
 
     // New stake authority (Pubkey as base58 string)