update course teaser

about/syllabus_bits/course_teaser.md

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+This course will be a LOT of fun, you'll get lots of practice doing a lot of Python, and you'll learn some cool things.
+
+By the end of the course, you'll (hopefully) feel super comfortable with algorithms and programming.
+Strap in, it will be a wild ride!!
+
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 ```{tip}
 Number one reason thing to take away from this is...
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