Update Solution.md - Task Typo Fix.

changed "substruction" to "subtraction" in Task section of "Type Conversions."

Author: Thespawnexe

1-js/02-first-steps/06-type-conversions/1-primitive-conversions-questions/solution.md

@@ -17,6 +17,6 @@ undefined + 1 = NaN // (4)
 ```
 
 1. The addition with a string `"" + 1` converts `1` to a string: `"" + 1 = "1"`, and then we have `"1" + 0`, the same rule is applied.
-2. The substruction `"-"` (like most math operations) only works with numbers, it converts an empty string `""` to `0`.
+2. The subtraction `"-"` (like most math operations) only works with numbers, it converts an empty string `""` to `0`.
 3. `null` becomes `0` after the numeric conversion.
 4. `undefined` becomes `NaN` after the numeric conversion.