Url encode to escape special characters (#7664)

Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com>
Co-authored-by: Stefan Holderbach <sholderbach@users.noreply.github.com>

crates/nu-command/src/default_context.rs

@@ -436,6 +436,7 @@ pub fn create_default_context() -> EngineState {
             Fetch,
             Post,
             Url,
+            UrlEncode,
             UrlParse,
             Port,
         }