go: add «45. Jump Game II»

URL:	https://leetcode.com/problems/jump-game-ii/
Signed-off-by: Matej Focko <me@mfocko.xyz>

go/jump-game-ii.go

@@ -0,0 +1,15 @@
+package main
+
+func jump(nums []int) int {
+	jumps, end, furthest := 0, 0, 0
+
+	for i := 0; i < len(nums)-1; i++ {
+		furthest = max(furthest, i+nums[i])
+		if i == end {
+			jumps++
+			end = furthest
+		}
+	}
+
+	return jumps
+}