docs: Fix a few typos

[timgates42]

There are small typos in:

• anagrams/solution.py
• jump_game_ii/solution3.py
• search_for_a_range/solution2.py

Fixes:

• Should read occurrence rather than occurence.
• Should read occurrences rather than occurences.
• Should read minimum rather than mininum.

Semi-automated pull request generated by https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md