Update dependency wpackagist-plugin/classic-editor to v1.6.7

This MR contains the following updates:

Package	Type	Update	Change
wpackagist-plugin/classic-editor (source)	require	patch	1.6.6 -> 1.6.7

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composer.json

@@ -80,7 +80,7 @@
         "noblogs/themes-child": "6.0.2",
         "wpackagist-plugin/autopost-to-mastodon": "3.7",
         "wpackagist-plugin/bogo": "3.8.2",
-        "wpackagist-plugin/classic-editor": "1.6.6",
+        "wpackagist-plugin/classic-editor": "1.6.7",
         "wpackagist-plugin/disable-comments": "1.11.0",
         "wpackagist-plugin/dvk-social-sharing": "1.3.8",
         "wpackagist-plugin/footnotation": "1.2",