fix: rename stride parameter for clarity in snanmeanpn function

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Author: 0PrashantYadav0

lib/node_modules/@stdlib/stats/base/snanmeanpn/src/main.c

@@ -34,7 +34,7 @@
 *
 * @param N       number of indexed elements
 * @param X       input array
-* @param stride  stride length
+* @param strideX stride length
 * @return        output value
 */
 float API_SUFFIX(stdlib_strided_snanmeanpn)( const CBLAS_INT N, const float *X, const CBLAS_INT strideX ) {