Update maintainers (#356)

- Retire inactive maintainers: Artem Barger, Matthew B White
- Add active maintainer: Dave Enyeart

Signed-off-by: Mark S. Lewis <Mark.S.Lewis@outlook.com>

Author: bestbeforetoday

MAINTAINERS.md

@@ -1,25 +1,23 @@
-Maintainers
-===========
+# Maintainers
 
+| Name         | GitHub                                                | Chat            | email                      |
+| ------------ | ----------------------------------------------------- | --------------- | -------------------------- |
+| Dave Enyeart | [denyeart](https://github.com/denyeart)               | denyeart        | <enyeart@us.ibm.com>       |
+| Mark Lewis   | [bestbeforetoday](https://github.com/bestbeforetoday) | bestbeforetoday | <Mark.S.Lewis@outlook.com> |
 
-| Name                      | GitHub           | Chat            | email                     |
-|---------------------------|------------------|-----------------|---------------------------|
-| Artem Barger              | c0rwin           | c0rwin          | bartem@il.ibm.com         |
-| Matthew B White           | mbwhite          | mbwhite         | whitemat@uk.ibm.com       |
-| Mark Lewis                | bestbeforetoday  | bestbeforetoday | Mark.S.Lewis@outlook.com  |
+# Retired Maintainers
 
-Retired Maintainers
-===================
-
-| Name                      | GitHub           | Chat          | email                     |
-|---------------------------|------------------|---------------|---------------------------|
-| James Taylor              | jt-nti           | jtonline      | jamest@uk.ibm.com         |
-| Gari Singh                | mastersingh24    | mastersingh24 | gari.r.singh@gmail.com    |
-| Gennady Laventman         | gennadylaventman | gennadyl      | gennady@il.ibm.com        |
-| Jim Zhang                 | jimthematrix     | jimthematrix   | jim\_the\_matrix@hotmail.com        |
-| Luis Sanchez              | sanchezl         | sanchezl       | sanchezl@us.ibm.com                 |
-| Srinivasan Muralidharan   | muralisrini      | muralisr       | srinivasan.muralidharan99@gmail.com |
-| Yacov Manevich            | yacovm           | yacovm         | yacovm@il.ibm.com                   |
+| Name                    | GitHub                                                  | Chat          | email                                 |
+| ----------------------- | ------------------------------------------------------- | ------------- | ------------------------------------- |
+| Artem Barger            | [c0rwin](https://github.com/c0rwin)                     | c0rwin        | <bartem@il.ibm.com>                   |
+| Matthew B White         | [mbwhite](https://github.com/mbwhite)                   | mbwhite       | <whitemat@uk.ibm.com>                 |
+| James Taylor            | [jt-nti](https://github.com/jt-nti)                     | jtonline      | <jamest@uk.ibm.com>                   |
+| Gari Singh              | [mastersingh24](https://github.com/mastersingh24)       | mastersingh24 | <gari.r.singh@gmail.com>              |
+| Gennady Laventman       | [gennadylaventman](https://github.com/gennadylaventman) | gennadyl      | <gennady@il.ibm.com>                  |
+| Jim Zhang               | [jimthematrix](https://github.com/jimthematrix)         | jimthematrix  | <jim\_the\_matrix@hotmail.com>        |
+| Luis Sanchez            | [sanchezl](https://github.com/sanchezl)                 | sanchezl      | <sanchezl@us.ibm.com>                 |
+| Srinivasan Muralidharan | [muralisrini](https://github.com/muralisrini)           | muralisr      | <srinivasan.muralidharan99@gmail.com> |
+| Yacov Manevich          | [yacovm](https://github.com/yacovm)                     | yacovm        | <yacovm@il.ibm.com>                   |
 
 Also: Please see the [Release Manager section](https://github.com/hyperledger/fabric/blob/main/MAINTAINERS.md)