Adding my signature

Maarten Beeckmans · web-flow · commit df0a29459724 · 2021-03-24T10:30:12.000+01:00
diff --git a/index.md b/index.md
@@ -554,6 +554,7 @@ Signed,
 - Luna Duclos
 - Lupe Canaviri
 - Lyre Calliope
+- Maarten Beeckmans
 - Mackenzie 'maco' Morgan (former Ubuntu Developer Membership Board member)
 - Maddison Hellstrom
 - Madhulika Chambers (NumPy contributor)
