Constant tracing::stdlib::f16::consts::FRAC_1_SQRT_PI

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pub const FRAC_1_SQRT_PI: f16 = 0.564189583547756286948079451560772586_f16; // 0.56396f16
🔬This is a nightly-only experimental API. (f16 #116909)
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1/sqrt(π)