Proposing a PR to fix a few small typos

[timgates42]

Issue Type

[x] Bug (Typo)

Steps to Replicate and Expected Behaviour

• Examine docs/source/speedup.rst, easyAI/AI/TT.py and observe tranposition, however expect to see transposition.
• Examine easyAI/AI/TT.py and observe secuirty, however expect to see security.
• Examine docs/source/ai_descriptions.rst and observe resursion, however expect to see recursion.
• Examine easyAI/AI/Negamax.py and observe optionnally, however expect to see optionally.
• Examine easyAI/AI/DictTT.py and observe occured, however expect to see occurred.
• Examine easyAI/AI/TT.py and observe explicity, however expect to see explicitly.
• Examine docs/source/installation.rst and observe dowload, however expect to see download.
• Examine easyAI/AI/TT.py and observe dictionnary, however expect to see dictionary.
• Examine docs/source/speedup.rst and observe caracters, however expect to see characters.
• Examine easyAI/AI/Negamax.py and observe acccording, however expect to see according.

Notes

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

To avoid wasting CI processing resources a branch with the fix has been
prepared but a pull request has not yet been created. A pull request fixing
the issue can be prepared from the link below, feel free to create it or
request @timgates42 create the PR. Alternatively if the fix is undesired please
close the issue with a small comment about the reasoning.

https://github.com/timgates42/easyAI/pull/new/bugfix_typos

Thanks.