flatpak: Bump olm dependency

olm 3.2.4 exports private symbols resulting in clash with purple
lurch plugin.
8 jobs for wip/sadiq/fix-flatpak in 14 minutes and 38 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build
passed build-pureos-gcc-byzantium #376843
librem5

00:03:18

passed build-pureos-gcc-byzantium-no-purple #376842
librem5

00:02:44

 
  Test
passed check-po #376845
librem5

00:00:18

passed test:debian-gcc #376844
librem5

00:03:06

19.0%
 
  Package
passed package-pureos-byzantium #376846
librem5

00:01:48

passed package-pureos-byzantium:arm64 #376847
librem5:arm64

00:05:07

 
  Test Package
passed autopkgtest-pureos-byzantium-package #376848
librem5

00:01:17

passed lintian-pureos-byzantium-package #376849
librem5

00:00:43