Fix spelling in require error message

[burz]

Noticed this while reading though the code

[asselstine]

Thank you!

[asselstine]

The test needs to be updated too:

v4-core/test/Reserve.test.ts

Line 247 in 09e247f

await expect(reserve.getReserveAccumulatedBetween(3, 2)).to.be.revertedWith(

[burz]

Thanks for pointing that out @asselstine! I've updated the test and rebased. I also tested that the tests pass too via yarn compile && yarn test