Fix year component of Anki version

so the directives within the string will get evaluated.

plugin/__init__.py

@@ -15,11 +15,11 @@
 
 import aqt
 
-required_anki_version = (26, 6, 3)
+required_anki_version = (24, 6, 3)
 anki_version = tuple(int(segment) for segment in aqt.appVersion.split("."))
 
 if anki_version < required_anki_version:
-    raise Exception("Minimum Anki version supported: {required_anki_version[0]}.{required_anki_version[1]}.{required_anki_version[2]}")
+    raise Exception(f"Minimum Anki version supported: {required_anki_version[0]}.{required_anki_version[1]}.{required_anki_version[2]}")
 
 import base64
 import glob