Allow comments in match blocks (#11717)

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# Description
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Fix #9878 

# User-Facing Changes
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Writing comments in match blocks will be allowed.

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crates/nu-parser/src/parser.rs

@@ -4177,7 +4177,7 @@ pub fn parse_match_block_expression(working_set: &mut StateWorkingSet, span: Spa
 
     let source = working_set.get_span_contents(inner_span);
 
-    let (output, err) = lex(source, start, &[b' ', b'\r', b'\n', b',', b'|'], &[], false);
+    let (output, err) = lex(source, start, &[b' ', b'\r', b'\n', b',', b'|'], &[], true);
     if let Some(err) = err {
         working_set.error(err);
     }