Site: Update community page / team (#2817)

Update entries for Alex + Mike (committer --> PPMC member).

Author: snazy

site/content/community/_index.adoc

@@ -73,7 +73,7 @@ cascade:
 |===
 
 | https://github.com/ajantha-bhat[Ajantha Bhat] | Committer | link:https://www.dremio.com/[Dremio]
-| https://github.com/adutra[Alex Dutra] | Committer | link:https://www.dremio.com/[Dremio]
+| https://github.com/adutra[Alex Dutra] | PPMC Member | link:https://www.dremio.com/[Dremio]
 | https://github.com/annafil[Anna Filippova] | Committer | link:https://www.snowflake.com/[Snowflake]
 | Anoop Johnson | PPMC Member | link:https://www.google.com/[Google]
 | https://github.com/ashvina[Ashvin Agrawal] | PPMC Member | link:https://www.microsoft.com/[Microsoft]
@@ -87,7 +87,7 @@ cascade:
 | https://github.com/vvcephei[John Roesler] | PPMC Member | link:https://www.confluent.io/[Confluent]
 | https://github.com/HonahX[Jonas Jiang] | Committer | link:https://www.snowflake.com/[Snowflake]
 | Kent Yao | Mentor |
-| https://github.com/collado-mike[Michael Collado] | Committer | link:https://www.snowflake.com/[Snowflake]
+| https://github.com/collado-mike[Michael Collado] | PPMC Member | link:https://www.snowflake.com/[Snowflake]
 | https://github.com/pingtimeout[Pierre Laporte] | Committer | link:https://www.dremio.com/[Dremio]
 | https://github.com/singhpk234[Prashant Singh] | Committer | link:https://www.snowflake.com/[Snowflake]
 | https://github.com/snazy[Robert Stupp] | PPMC Member | link:https://www.dremio.com/[Dremio]