[libc][NFC] Fix typo in dyadic_float.h (#83846)

Author: gchatelet

libc/src/__support/FPUtil/dyadic_float.h

@@ -19,7 +19,7 @@
 
 namespace LIBC_NAMESPACE::fputil {
 
-// A generic class to perform comuptations of high precision floating points.
+// A generic class to perform computations of high precision floating points.
 // We store the value in dyadic format, including 3 fields:
 //   sign    : boolean value - false means positive, true means negative
 //   exponent: the exponent value of the least significant bit of the mantissa.