MAINTAINERS: Update entries from the Nitro Enclaves section

Update the list of maintainers for the Nitro Enclaves project. Alex
(lexnv@) is not working at Amazon anymore and there will be the same
case for me starting with 2023.

Add a reference to the mailing list of the Nitro Enclaves development
team.
Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
Acked-by: Alexandru Vasile <acvasile96@gmail.com>
Link: https://lore.kernel.org/r/20221108185912.15792-1-andraprs@amazon.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -14569,10 +14569,9 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git
 F:	arch/nios2/
 
 NITRO ENCLAVES (NE)
-M:	Andra Paraschiv <andraprs@amazon.com>
-M:	Alexandru Vasile <lexnv@amazon.com>
 M:	Alexandru Ciobotaru <alcioa@amazon.com>
 L:	linux-kernel@vger.kernel.org
+L:	The AWS Nitro Enclaves Team <aws-nitro-enclaves-devel@amazon.com>
 S:	Supported
 W:	https://aws.amazon.com/ec2/nitro/nitro-enclaves/
 F:	Documentation/virt/ne_overview.rst