[Website]: Add raulcd as PMC (#432)

Per https://lists.apache.org/thread/zmom0gcvnld7phb43bjwzm8wf8x5zsmo

Update website to show @raulcd  as PMC member.
diff --git a/_data/committers.yml b/_data/committers.yml
index f680650..634e7f4 100644
--- a/_data/committers.yml
+++ b/_data/committers.yml
@@ -179,6 +179,10 @@
   role: PMC
   alias: tustvold
   affiliation: InfluxData
+- name: Raúl Cumplido
+  role: PMC
+  alias: raulcd
+  affiliation: Voltron Data
 - name: Reynold Xin
   role: PMC
   alias: rxin
@@ -368,10 +372,6 @@
   role: Committer
   alias: praveenbingo
   affiliation: Dremio
-- name: Raúl Cumplido
-  role: Committer
-  alias: raulcd
-  affiliation: Voltron Data
 - name: Ravindra Pindikura
   role: Committer
   alias: ravindra