docs: reformat link to ledger headers in events.rs

For better appearance in the CLI, and to still work with MDX v3,
this change removes the link definition, in favor of the bare URL.
I'm also adding a macro for clippy to ignore the "improper
markdown" in this comment.

FULL_HELP_DOCS.md

@@ -627,9 +627,7 @@ Watch the network for contract events
 
 ###### **Options:**
 
-* `--start-ledger <START_LEDGER>` — The first [ledger sequence] number in the range to pull events
-
-   [ledger sequence]: https://developers.stellar.org/docs/encyclopedia/ledger-headers#ledger-sequence
+* `--start-ledger <START_LEDGER>` — The first ledger sequence number in the range to pull events https://developers.stellar.org/docs/encyclopedia/ledger-headers#ledger-sequence
 * `--cursor <CURSOR>` — The cursor corresponding to the start of the event range
 * `--output <OUTPUT>` — Output formatting options for event stream
 

cmd/soroban-cli/src/commands/events.rs

@@ -12,9 +12,9 @@ use crate::rpc;
 #[derive(Parser, Debug, Clone)]
 #[group(skip)]
 pub struct Cmd {
-    /// The first [ledger sequence] number in the range to pull events
-    ///
-    /// [ledger sequence]: https://developers.stellar.org/docs/encyclopedia/ledger-headers#ledger-sequence
+    #[allow(clippy::doc_markdown)]
+    /// The first ledger sequence number in the range to pull events
+    /// https://developers.stellar.org/docs/encyclopedia/ledger-headers#ledger-sequence
     #[arg(long, conflicts_with = "cursor", required_unless_present = "cursor")]
     start_ledger: Option<u32>,
     /// The cursor corresponding to the start of the event range.