Auto merge of #16232 - hiikezoe:justify-content-fix, r=bholley

Fix justify-content values.

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This is a PR for https://bugzilla.mozilla.org/show_bug.cgi?id=1352771

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- [X] `./mach test-tidy` does not report any errors

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- [X] These changes do not require tests because it's for stylo

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components/style/values/specified/align.rs

@@ -358,9 +358,9 @@ fn parse_content_distribution(input: &mut Parser) -> Result<AlignFlags, ()> {
     let ident = input.expect_ident()?;
     match_ignore_ascii_case! { &ident,
       "stretch" => Ok(ALIGN_STRETCH),
-      "space_between" => Ok(ALIGN_SPACE_BETWEEN),
-      "space_around" => Ok(ALIGN_SPACE_AROUND),
-      "space_evenly" => Ok(ALIGN_SPACE_EVENLY),
+      "space-between" => Ok(ALIGN_SPACE_BETWEEN),
+      "space-around" => Ok(ALIGN_SPACE_AROUND),
+      "space-evenly" => Ok(ALIGN_SPACE_EVENLY),
       _ => Err(())
     }
 }