Fix architecture in app manifest.

[p4p4j0hn]

Problem

• Problem reported by flatrongraad on forum. Can no long upgrade Trilium on armhf architecture.

Solution

• Changed architecture to "all"

PR Status

• [x] Code finished and ready to be reviewed/tested
• [x] The fix/enhancement were manually tested (if applicable)

Automatic tests

Automatic tests can be triggered on https://ci-apps-dev.yunohost.org/ after creating the PR, by commenting "!testme", "!gogogadgetoci" or "By the power of systemd, I invoke The Great App CI to test this Pull Request!". (N.B. : for this to work you need to be a member of the Yunohost-Apps organization)

[p4p4j0hn]

Had to reset my testing branch to match so that there weren't extra commits.