doap: Fix sytnax

Wrap each person within <maintainer/>
6 jobs for master in 10 minutes and 12 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #292568
librem5
build:native

00:01:46

 
  Test
passed #292569
librem5
test:native

00:01:18

 
  Package
passed #292570
librem5
package:deb-debian-buster

00:02:18

passed #292571
librem5:arm64
package:deb-debian-buster:arm64

00:05:49

 
  Test Package
passed #292572
librem5
autopkgtest-debian-buster-package

00:01:17

passed #292573
librem5
lintian-debian-buster-package

00:00:37