Change Partner link to Teams developer documentation on AC

[Josverl]

As the target audience of this page is the developer audience Can you please replace the link partner link for Microsoft Teams , to one that actually has relevant information on what Adaptive Cards Features are / are not supported by Teams ?

=== Old ===
[Microsoft Teams](https://products.office.com/microsoft-teams/group-chat-software) 
=== New ===
[Microsoft Teams](https://docs.microsoft.com/en-us/microsoftteams/platform/task-modules-and-cards/cards/cards-reference#support-for-adaptive-cards)
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Document Details

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• ID: db11bc3a-be2d-998f-0bfa-b2d70a33f2ef
• Version Independent ID: c05ee199-ad86-0c01-c9bf-9b226f36c841
• Content: Adaptive Cards Partners - Adaptive Cards
• Content Source: AdaptiveCards/resources/partners.md
• Product: adaptive-cards
• GitHub Login: @matthidinger
• Microsoft Alias: mahiding