Update 02-analyze-spark.md

[thomasthaddeus]

Module: 02

Lab/Demo: 01

Fixes #123

Changes proposed in this pull request:

• make the codeblock follow the same typing as the rest of the document
• If not it adds spaces in front of the codeblock throwing off proper spacing

[afelix-95]

The change in the syntax highlighting for the code block from lowercase p to uppercase P yields the same output in the .md file