Update roles for Registry Metadata Steward (#2227)

* Update roles for Registry Metadata Steward

* Update _data/roles.yml

* Add start date

Co-authored-by: Deepak Unni <deepak.unni@sib.swiss>
Co-authored-by: Nico Matentzoglu <nicolas.matentzoglu@gmail.com>

Author: 3 people

_data/roles.yml

@@ -1,5 +1,5 @@
 - name: Registry Metadata Steward
-  open: true
+  open: false
   commitment: 2-6 hours per month
   requirements:
     - love for metadata
@@ -20,7 +20,11 @@
   people:
     - name: matentzn
       orcid: 0000-0002-7356-1779
+      status: support
+    - name: deepakunni3
+      orcid: 0000-0002-3583-7340
       status: lead
+      start: 2022-12
 - name: OBO New Ontology Request (NOR) Manager
   open: false
   commitment: 2-6 hours per month