Move Class Based Program Design earlier

Resolves #1272

README.md

@@ -169,10 +169,10 @@ All coursework under Core CS is **required**, unless otherwise indicated.
 Courses | Duration | Effort | Prerequisites | Discussion
 :-- | :--: | :--: | :--: | :--:
 [Systematic Program Design](coursepages/spd/README.md) | 13 weeks | 8-10 hours/week | none | chat: [part 1](https://discord.gg/RfqAmGJ) / [part 2](https://discord.gg/kczJzpm)
+[Class-based Program Design](https://course.ccs.neu.edu/cs2510sp22/index.html) | 13 weeks | 5-10 hours/week | Systematic Program Design, High School Math | [chat](https://discord.com/channels/744385009028431943/891411727294562314)
 [Programming Languages, Part A](https://www.coursera.org/learn/programming-languages) | 5 weeks | 4-8 hours/week | Systematic Program Design ([Hear instructor](https://www.coursera.org/lecture/programming-languages/recommended-background-k1yuh)) | [chat](https://discord.gg/8BkJtXN)
 [Programming Languages, Part B](https://www.coursera.org/learn/programming-languages-part-b) | 3 weeks | 4-8 hours/week | Programming Languages, Part A | [chat](https://discord.gg/EeA7VR9)
 [Programming Languages, Part C](https://www.coursera.org/learn/programming-languages-part-c) | 3 weeks | 4-8 hours/week | Programming Languages, Part B | [chat](https://discord.gg/8EZUVbA)
-[Class-based Program Design](https://course.ccs.neu.edu/cs2510sp22/index.html) | 13 weeks | 5-10 hours/week | Systematic Program Design, High School Math | [chat](https://discord.com/channels/744385009028431943/891411727294562314)
 [Object-Oriented Design](https://course.ccs.neu.edu/cs3500f19/) | 13 weeks | 5-10 hours/week | Class Based Program Design | [chat](https://discord.com/channels/744385009028431943/891412022120579103)
 [Software Architecture](https://www.coursera.org/learn/software-architecture) | 4 weeks | 2-5 hours/week | Object Oriented Design | [chat](https://discord.com/channels/744385009028431943/891412169638432788)