doc: fixup security release announcement

- Fixup date show is show in news properly
- Add severity of second vulnerability

Signed-off-by: Michael Dawson <mdawson@devrus.com>

locale/en/blog/vulnerability/january-2021-security-releases.md

@@ -1,5 +1,5 @@
 ---
-date: 2020-01-04T19:00:00.000Z
+date: 2021-01-04T19:30:00.000Z
 category: vulnerability
 title: January 2021 Security Releases
 slug: january-2021-security-releases
@@ -26,7 +26,7 @@ Impacts:
 
 Thank you to Felix Wilhelm from Google Project Zero for reporting this vulnerability.
 
-### HTTP Request Smuggling in nodejs (CVE-2020-8287)
+### HTTP Request Smuggling in nodejs (Low) (CVE-2020-8287)
 
 Affected versions of Node.js allow two copies of a header field in a http request. For example, two Transfer-Encoding header fields. In this case Node.js identifies the first header field and ignores the second. This can lead to HTTP Request Smuggling (https://cwe.mitre.org/data/definitions/444.html).