Auto merge of #14156 - frewsxcv:cors-capitalization, r=KiChjang

Update CORS naming from 'CORS' to 'Cors'.

As per:

https://aturon.github.io/style/naming/README.html#general-conventions-[rfc-#430]

Acronyms should be considered one word and not all caps.

<!-- Reviewable:start -->

---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/14156)
<!-- Reviewable:end -->

components/net_traits/response.rs

@@ -17,7 +17,7 @@ use url::Url;
 #[derive(Clone, PartialEq, Debug, Deserialize, Serialize, HeapSizeOf)]
 pub enum ResponseType {
     Basic,
-    CORS,
+    Cors,
     Default,
     Error(NetworkError),
     Opaque,
@@ -202,7 +202,7 @@ impl Response {
                 response.headers = headers;
             },
 
-            ResponseType::CORS => {
+            ResponseType::Cors => {
                 let access = old_headers.get::<AccessControlExposeHeaders>();
                 let allowed_headers = access.as_ref().map(|v| &v[..]).unwrap_or(&[]);