Content-Type should be "image/jpeg", not "image/jpg"

The following:

curl -I "https://seccdn.libravatar.org/avatar/63a75a80e6b1f4adfdb04c1ca02e596c?s=72&d=monsterid" 

result in:

HTTP/1.1 200 OK
Date: Wed, 27 Feb 2019 13:42:43 GMT
Server: Apache/2.4.34 (Fedora) OpenSSL/1.1.0i-fips mod_wsgi/4.5.20 Python/3.6
Strict-Transport-Security: max-age=31536000; preload; includeSubDomains
Content-Length: 2210
Vary: Accept-Language,Cookie
Content-Language: en
X-Frame-Options: SAMEORIGIN
Content-Type: image/jpg

I suppose Content-Type should be image/jpeg