Update security-windows.md

[TheBluLion]

Network security needs to allow traffic to Common and shared infrastructure endpoints in addition to Teams endpoints.

[opbld31]

Learn Build status updates of commit e4835ec:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
Teams/rooms/security-windows.md	:white_check_mark:Succeeded

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

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[scanum]

@dstrome PR has been copyedited and is ready for final review, could you please check and merge? Thanks!