minor #16590 Added progressive jpeg to mime types guesser (Koc)

This PR was submitted for the 2.3 branch but it was merged into the 2.7 branch instead (closes #16590).

Discussion
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Added progressive jpeg to mime types guesser

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
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2c99a0a Added progressive jpeg to mime types guesser

Author: fabpot

src/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeExtensionGuesser.php

@@ -661,6 +661,7 @@ class MimeTypeExtensionGuesser implements ExtensionGuesserInterface
         'image/gif' => 'gif',
         'image/ief' => 'ief',
         'image/jpeg' => 'jpeg',
+        'image/pjpeg' => 'jpeg',
         'image/ktx' => 'ktx',
         'image/png' => 'png',
         'image/prs.btif' => 'btif',