Fix incorrect CVE reference in changelog fragment

Change:
This corrects an incorrect CVE identifier in the changelog entry for
CVE-2020-1735.

Test Plan:
N/A

Tickets:
Refs #67793, #68720

Signed-off-by: Rick Elrod <rick@elrod.me>

changelogs/fragments/fetch_no_slurp.yml

@@ -1,2 +1,2 @@
 bugfixes:
-    - In fetch action, avoid using slurp return to set up dest, also ensure no dir traversal CVE-2019-3828.
+    - In fetch action, avoid using slurp return to set up dest, also ensure no dir traversal CVE-2020-1735.