tof: membership-and-voting: List projects requiring petitions

Make it harder to overlook the requirement for a petition for
eligibility where significant contributions are made to the listed
projects.

In time I'd like to see the eligibility scripts expanded to provide
analysis of the mailing list so explicit petitions are not required[1].

[1] https://discord.com/channels/775381525260664832/775381525260664836/932783522668773436

Change-Id: Icfe714462a9164d4c1d814106f995f897794fc2e
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/tof/membership-and-voting.md b/tof/membership-and-voting.md
index c2c2c6e..265d210 100644
--- a/tof/membership-and-voting.md
+++ b/tof/membership-and-voting.md
@@ -94,6 +94,16 @@
 significant support activities in areas not covered by existing metrics such as
 Wikis and Discord.
 
+Currently, work on the following projects requires an explicit petition for
+recognition of ToF membership eligibility:
+
+* Linux
+* u-boot
+* QEMU
+* bitbake
+* open-embedded
+* Poky
+
 ### Metrics
 
 Determination of membership in the community is made by a point system for