Fix 'since' version in 'deprecated' attribute.

Author: SergioBenitez

core/http/src/method.rs

@@ -300,7 +300,7 @@ impl Method {
     /// Deprecated. Returns `self.allows_request_body() == Some(true)`.
     ///
     /// Use [`Method::allows_request_body()`] instead.
-    #[deprecated(since = "0.6", note = "use Self::allows_request_body()")]
+    #[deprecated(since = "0.6.0", note = "use Self::allows_request_body()")]
     pub const fn supports_payload(self) -> bool {
         match self.allows_request_body() {
             Some(v) => v,