Fix missing word in sys.float_info docstring (pythonGH-93489)

(cherry picked from commit e12f34b)

Co-authored-by: Mark Dickinson <dickinsm@gmail.com>

Objects/floatobject.c

@@ -64,7 +64,7 @@ static PyStructSequence_Field floatinfo_fields[] = {
     {"min_exp",         "DBL_MIN_EXP -- minimum int e such that radix**(e-1) "
                     "is a normalized float"},
     {"min_10_exp",      "DBL_MIN_10_EXP -- minimum int e such that 10**e is "
-                    "a normalized"},
+                    "a normalized float"},
     {"dig",             "DBL_DIG -- maximum number of decimal digits that "
                     "can be faithfully represented in a float"},
     {"mant_dig",        "DBL_MANT_DIG -- mantissa digits"},