PyCharm Code Inspect fixes for Solutions and Examples (#18393)

Co-authored-by: UltralyticsAssistant <web@ultralytics.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

ultralytics/solutions/security_alarm.py

@@ -34,6 +34,9 @@ class SecurityAlarm(BaseSolution):
         super().__init__(**kwargs)
         self.email_sent = False
         self.records = self.CFG["records"]
+        self.server = None
+        self.to_email = ""
+        self.from_email = ""
 
     def authenticate(self, from_email, password, to_email):
         """
@@ -91,7 +94,7 @@ class SecurityAlarm(BaseSolution):
 
         # Add the text message body
         message_body = f"Ultralytics ALERT!!! " f"{records} objects have been detected!!"
-        message.attach(MIMEText(message_body, "plain"))
+        message.attach(MIMEText(message_body))
 
         # Attach the image
         image_attachment = MIMEImage(img_bytes, name="ultralytics.jpg")