docs: Fix a few typos

[timgates42]

There are small typos in:

• data_structures/array/all_numbers_divisible.py
• data_structures/array/index.md
• data_structures/binary_trees/children_sum_property.py
• data_structures/graphs/cycle_in_directed_graph_using_colors.py
• data_structures/graphs/cycle_in_directed_graph_using_colors_recursive.py
• data_structures/graphs/dag_longest_path.py
• data_structures/heap/max_heap.py
• data_structures/strings/KMP_Pattern_Search.py

Fixes:

• Should read initial rather than inital.
• Should read equal rather than eqaul.
• Should read satisfies rather than statisfies.
• Should read divisible rather than divisble.
• Should read comparison rather than comparision.
• Should read children rather than childen.
• Should read calculate rather than caluclate.

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