fixed typo on hints section

UmiKami · UmiKami · commit 79d2a44e5073 · 2022-07-19T00:12:09.000Z
diff --git a/exercises/19-Bottles-Of-Milk/README.md b/exercises/19-Bottles-Of-Milk/README.md
@@ -37,4 +37,4 @@ Go to the store and buy some more, 99 bottles of milk on the wall.
 
 + At the end of the song, the lyrics change because is only one bottle (singular instead of plural).
 
-+ Read the last lyrics and you will see how the last line changes to `"go to the store and by some more"`.
++ Read the last lyrics and you will see how the last line changes to `"go to the store and buy some more"`.

Original file line number	Diff line number	Diff line change
`@@ -37,4 +37,4 @@ Go to the store and buy some more, 99 bottles of milk on the wall.`
`37`	`37`
`38`	`38`	`+ At the end of the song, the lyrics change because is only one bottle (singular instead of plural).`
`39`	`39`
`40`		-+ Read the last lyrics and you will see how the last line changes to `"go to the store and by some more"`.
	`40`	++ Read the last lyrics and you will see how the last line changes to `"go to the store and buy some more"`.