Update MAINTAINERS

Adding two main contributors to openbmc/telemetry as maintainers.

Thank you Jozef and Krzysztof for enormous work in delivering
the solution!

Signed-off-by: Adrian Ambrożewicz <adrian.ambrozewicz@intel.com>
Change-Id: I93cb028e6b2ba086ae5d4a87664de2ab2741cb05
diff --git a/MAINTAINERS b/MAINTAINERS
index 16434b9..a767391 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -50,4 +50,6 @@
 -------------------------
 
 M:  Adrian Ambrozewicz <adrian.ambrozewicz@linux.intel.com> <aambroze!>
-R:  Piotr Matuszczak <piotr.matuszczak@intel.com>
\ No newline at end of file
+M:  Jozef Wludzik <jozef.wludzik@intel.com>
+M:  Krzysztof Grobelny <krzysztof.grobelny@intel.com>
+R:  Piotr Matuszczak <piotr.matuszczak@intel.com>