Fixing the typo in Python-GSoC documentation (extra 'the')

[randoduck]

Created this PR to fix a typo I found in the "What do bad applications look like?" section's description of this site https://python-gsoc.org/ .

What I changed:

• Removed an extra "the" from the sentence:
  "Python regularly discards about half of our the GSoC applications"
  to
  "Python regularly discards about half of our GSoC applications"

This improves readability and fixes the grammar of the sentence .

[terriko]

Thanks! (And sorry it took so long to merge this; you hit us during the off-season)