fix onnxruntime memoryleak when load model (#2108)

locasxe

2024-09-25 c494d8fd18c29f601829f428a327b09ac7c29aed

 runtime/csharp/AliParaformerAsr/AliParaformerAsr/WavFrontend.cs

@@ -30,7 +30,8 @@
            _fbank_beg_idx = 0;
            _onlineFbank = new OnlineFbank(
                dither: _frontendConfEntity.dither,
                snip_edges: false,
                snip_edges: _frontendConfEntity.snip_edges,
                window_type: _frontendConfEntity.window,
                sample_rate: _frontendConfEntity.fs,
                num_bins: _frontendConfEntity.n_mels
                );