LibJS: Update spec comments to use ToZeroPaddedDecimalString AO

This is an editorial change in the ECMA-262 and Temporal specs.

See:
- 843d8b8
- f9211d9

Note that we don't actually need to implement the AO as we already have
String::formatted() for this, and use unified format strings instead of
zero-padding in individual steps in many cases anyway.

Userland/Libraries/LibJS/Runtime/Temporal/PlainTime.cpp

@@ -427,8 +427,8 @@ String temporal_time_to_string(u8 hour, u8 minute, u8 second, u16 millisecond, u
 {
     // 1. Assert: hour, minute, second, millisecond, microsecond and nanosecond are integers.
 
-    // 2. Let hour be hour formatted as a two-digit decimal number, padded to the left with a zero if necessary.
-    // 3. Let minute be minute formatted as a two-digit decimal number, padded to the left with a zero if necessary.
+    // 2. Let hour be ToZeroPaddedDecimalString(hour, 2).
+    // 3. Let minute be ToZeroPaddedDecimalString(minute, 2).
 
     // 4. Let seconds be ! FormatSecondsStringPart(second, millisecond, microsecond, nanosecond, precision).
     auto seconds = format_seconds_string_part(second, millisecond, microsecond, nanosecond, precision);