Fix QueryBuilder.TermAt<T>(int termIndex) - #12

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-dotnet@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

'Inline arrays' language feature is not supported for an inline array type that is not valid as a type argument, or has element type that is not valid as a type argument.

'Inline arrays' language feature is not supported for an inline array type that is not valid as a type argument, or has element type that is not valid as a type argument.

'Inline arrays' language feature is not supported for an inline array type that is not valid as a type argument, or has element type that is not valid as a type argument.

'Inline arrays' language feature is not supported for an inline array type that is not valid as a type argument, or has element type that is not valid as a type argument.

'Inline arrays' language feature is not supported for an inline array type that is not valid as a type argument, or has element type that is not valid as a type argument.

'Inline arrays' language feature is not supported for an inline array type that is not valid as a type argument, or has element type that is not valid as a type argument.