Fix blind link

"Write brief but meaningful link text, using the title or a description of a page rather than a generic phrase like 'click here'." Microsoft Writing Style Guide: https://styleguides.azurewebsites.net/Styleguide/Read?id=2700&topicid=34905

Author: garycentric

includes/mdo-trial-banner.md

@@ -12,4 +12,4 @@ search.appverid: met150
 ---
 
 > [!TIP]
-> *Did you know you can try the features in Microsoft Defender XDR for Office 365 Plan 2 for free?* Use the 90-day Defender for Office 365 trial at the [Microsoft Defender portal trials hub](https://security.microsoft.com/trialHorizontalHub?sku=MDO&ref=DocsRef). Learn about who can sign up and trial terms [here](/defender-office-365/try-microsoft-defender-for-office-365).
+> *Did you know you can try the features in Microsoft Defender XDR for Office 365 Plan 2 for free?* Use the 90-day Defender for Office 365 trial at the [Microsoft Defender portal trials hub](https://security.microsoft.com/trialHorizontalHub?sku=MDO&ref=DocsRef). Learn about who can sign up and trial terms on [Try Microsoft Defender for Office 365](/defender-office-365/try-microsoft-defender-for-office-365).