fix: rename constant to follow float32 naming conventions

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Author: anandkaranubc

lib/node_modules/@stdlib/constants/float32/significand-mask/include/stdlib/constants/float32/significand_mask.h

@@ -22,6 +22,6 @@
 /**
 * Macro for the mask for the significand of a single-precision floating-point number.
 */
-#define STDLIB_CONSTANT_FLOAT_SIGNIFICAND_MASK 0x007fffff
+#define STDLIB_CONSTANT_FLOAT32_SIGNIFICAND_MASK 0x007fffff
 
 #endif // !STDLIB_CONSTANTS_FLOAT32_SIGNIFICAND_MASK_H