Create the Environmental Sustainability SIG

This patch sets up the sustainability SIG as a result of
conversations at a Forum session in Berlin 2022.

https://etherpad.opendev.org/p/BER-2022-Forum-Sustainable-OpenInfra

Change-Id: I14fdf00987c0b25d7b36d5fcc68a407b6e1951ea

sigs.yaml

@@ -104,6 +104,27 @@ Edge Computing:
   status: active
   url: https://wiki.openstack.org/wiki/Edge_Computing_Group
 
+Environmental Sustainability:
+  chairs:
+    - name: Jegor van Opdorp
+      irc:
+      email: jegor@leaf.cloud
+    - name: Julia Kreger
+      irc: TheJulia
+      email: juliaashleykreger@gmail.com
+    - name: Kendall Nelson
+      irc: diablo_rojo
+      email: knelson@openinfra.dev
+  scope: >
+    The Environmental Sustainability SIG seeks to improve the energy efficiency, energy
+    management, and related environmental impact of cloud computing. These
+    goals will be approached through activities like providing recommendations
+    through documentation on lessening environmental impact and working as a
+    community to find and provide new ways for OpenStack (and OpenInfra) to
+    have less negative impact.
+  status: forming
+  url: https://wiki.openstack.org/wiki/Environmental_Sustainability_SIG
+
 Stable Maintenance:
   chairs:
     - name: Elõd Illés
@@ -331,6 +352,7 @@ Security:
   status: active
   url: https://wiki.openstack.org/wiki/Security-SIG
 
+
 Testing and Collaboration Tools:
   chairs:
     - name: Jeremy Stanley