MAINTAINERS: Update pstore maintainers

Update pstore to better reflect reality of active contributors:

- Remove Anton and Colin (thank you for your help through the years!)
- Move Tony to Reviewer
- Add Guilherme as Reviewer
- Add mailing list
- Upgrade to Supported

Signed-off-by: Kees Cook <[email protected]>
Acked-by: Guilherme G. Piccoli <[email protected]>
Acked-by: Colin Cross <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: kees

MAINTAINERS

@@ -16641,10 +16641,10 @@ F:	net/psample
 
 PSTORE FILESYSTEM
 M:	Kees Cook <[email protected]>
-M:	Anton Vorontsov <[email protected]>
-M:	Colin Cross <ccross@android.com>
-M:	Tony Luck <[email protected]>
-S:	Maintained
+R:	Tony Luck <[email protected]>
+R:	Guilherme G. Piccoli <gpiccoli@igalia.com>
+L:	[email protected]
+S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/pstore
 F:	Documentation/admin-guide/ramoops.rst
 F:	Documentation/admin-guide/pstore-blk.rst