Update dependency wpackagist-plugin/event-organiser to v3.12.3

This MR contains the following updates:

Package	Type	Update	Change
wpackagist-plugin/event-organiser (source)	require	patch	3.12.2 -> 3.12.3

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composer.json

@@ -124,7 +124,7 @@
         "wpackagist-theme/digitally": "1.0.8",
         "wpackagist-theme/ff-multipurpose": "1.2.1",
         "wpackagist-plugin/two-factor-provider-webauthn": "2.0.1",
-        "wpackagist-plugin/event-organiser": "3.12.2",
+        "wpackagist-plugin/event-organiser": "3.12.3",
         "noblogs/ai-authenticate-rest-api-plugin": "0.0.3",
         "wpackagist-plugin/multisite-custom-css": "1.0",
         "wpackagist-plugin/activitypub": "0.16.2",