Update stdlib/math.jou

Co-authored-by: Akuli <[email protected]>

stdlib/math.jou

@@ -86,7 +86,7 @@ declare exp10f(x: float) -> float
 
 # Returns the natural logarithm of x.
 declare log(x: double) -> double
-decalre logf(x: float) -> float
+declare logf(x: float) -> float
 declare log2(x: double) -> double
 declare log2f(x: float) -> float
 declare log10(x: double) -> double