Solve 50+ cargo doc warnings (#24071)

Release Notes:

- N/A

crates/anthropic/src/anthropic.rs

@@ -250,7 +250,7 @@ pub async fn stream_completion(
         .map(|output| output.0)
 }
 
-/// https://docs.anthropic.com/en/api/rate-limits#response-headers
+/// <https://docs.anthropic.com/en/api/rate-limits#response-headers>
 #[derive(Debug)]
 pub struct RateLimitInfo {
     pub requests_limit: usize,
@@ -626,7 +626,7 @@ pub struct ApiError {
 }
 
 /// An Anthropic API error code.
-/// https://docs.anthropic.com/en/api/errors#http-errors
+/// <https://docs.anthropic.com/en/api/errors#http-errors>
 #[derive(Debug, PartialEq, Eq, Clone, Copy, EnumString)]
 #[strum(serialize_all = "snake_case")]
 pub enum ApiErrorCode {

crates/anthropic/src/supported_countries.rs

@@ -3,7 +3,7 @@ use std::sync::LazyLock;
 
 /// Returns whether the given country code is supported by Anthropic.
 ///
-/// https://www.anthropic.com/supported-countries
+/// <https://www.anthropic.com/supported-countries>
 pub fn is_supported_country(country_code: &str) -> bool {
     SUPPORTED_COUNTRIES.contains(&country_code)
 }