message: Update find-substring-with-given-hash-value.cpp
diff: @@ -7,7 +7,7 @@ public:
  string subStrHash(string s, int power, int modulo, int k, int hashValue) {
  int idx = 0;
  for (int64_t i = size(s) - 1, pw = 1, h = 0; i >= 0; --i) {
  - if (i > size(s) - k) {
  + if ((size(s) - 1) - i + 1 <= k - 1) {
  pw = (pw * power) % modulo;
  }
  if (i + k < size(s)) {
  