Fix expiry date comparison in OutputCacheHelper class

[eypcnckr]

• Fix expiry date comparison to use DateTime.UtcNow for correct UTC time zone #handling

Addresess #23

[eypcnckr]

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Pull Request Overview

This pull request fixes a bug in the expiry date comparison in the OutputCacheHelper class by replacing DateTime.Now with DateTime.UtcNow, ensuring the cache expiry logic is evaluated in UTC.

• Use DateTime.UtcNow instead of DateTime.Now in the InsertResponseAsync method
• Addresses potential issues with cache expiry across different time zones

Comments suppressed due to low confidence (1)

src/OutputCacheModuleAsync/OutputCacheHelper.cs:1063

• The replacement of DateTime.Now with DateTime.UtcNow correctly fixes the expiry comparison, but please ensure that the utcExpires value is consistently provided in UTC to avoid potential mismatches.

if (utcExpires > DateTime.UtcNow) {