Fix typo in Heap Sort README lg -> log

[satbot]

Checklist

• I've looked at the contribution guidelines.
• This pull request is complete and ready for review.

Description

"No contribution is too small", I fixed a single character typo in the Heap Sort README. (First open source contribution ever 🙂)

[hollance]

It's not really a typo. 😄 lg is often used as shorthand for log_2, while log is more ambiguous (is it log_10, log_2, or the natural logarithm?).

[satbot]

It's not really a typo. 😄 lg is often used as shorthand for log_2, while log is more ambiguous (is it log_10, log_2, or the natural logarithm?).

Oh wow I actually did not know that, at least I learned something from this process 😁

@hollance while I now recognise that lg is technically correct, I still think that it should be changed to log since the base 2 can be considered a constant factor which is "not important and can be omitted" from big O notation.

However, I'm happy for this to be closed if it seems unnecessary.

[kelvinlauKL]

Seems fair 👍