docs: Fix broken links

[2010YOUY01]

Which issue does this PR close?

• Closes #.

Rationale for this change

After reviewing #16830, I was trying to setup a CI with cargo-deadlinks to auto-detect broken links in the doc comments.
However, I found it a bit tricky, so in this PR I'm fixing some known broken links. I'll also open an issue to set up such a CI check and try to address it later.

What changes are included in this PR?

Fix broken links in CI

Are these changes tested?

Are there any user-facing changes?

[jcsherin]

I've confirmed the URLs you fixed were returning 404. I used the lychee cli link checker which flagged them with a 404 Not Found error.

Unlike cargo-deadlinks, lychee works on the generated Rust docs in target/doc directory and cannot directly inspect the Rust code.

It also flagged two URLs in sqlparser crate.

1. https://docs.rs/sqlparser/latest/src/sqlparser/dialect/duckdb.rs.html#68

    /// See <https://duckdb.org/docs/sql/functions/lambda.html>
    fn supports_lambda_functions(&self) -> bool {
        true
    }

Fix: https://duckdb.org/docs/stable/sql/functions/lambda

2. https://docs.rs/sqlparser/latest/src/sqlparser/ast/ddl.rs.html#149

    /// `ATTACH PART|PARTITION <partition_expr>`
    /// Note: this is a ClickHouse-specific operation, please refer to
    /// [ClickHouse](https://clickhouse.com/docs/en/sql-reference/statements/alter/pakrtition#attach-partitionpart)
    AttachPartition {
        // PART is not a short form of PARTITION, it's a separate keyword
        // which represents a physical file on disk and partition is a logical entity.
        partition: Partition,
    },

Fix: https://clickhouse.com/docs/sql-reference/statements/alter/partition#attach-partitionpart

[jcsherin]

👍

[alamb]

Thanks @2010YOUY01 and @jcsherin