'years' and 'temps' should not be constants for 1-2

They start off as an empty array and then get added to so the cannot be `const `and should be `var` or `let` instead.

Search the JavaScript examples for the `years` and `temps` declarations mentioned in the issue. Check how those arrays are initialized and then updated. Done means they use a non-constant declaration while preserving the existing behavior; no test file or specific entry point is named.

索引モデルが issue の本文から書いたものです。