thunderbird: update to 78.10.0

[dkwo]

• thunderbird: update to 78.10.0
• thunderbird-i18n: update to 78.10.0

Have the results of the proposed changes been tested?

• I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
• I generally don't use the affected packages but briefly tested this PR

[skip CI]

[ericonr]

Thanks!

[ericonr]

[ci skip] is the correct invocation, but you know what? Please let it build on CI.

Helps me avoid having to cross build locally when I get to the PR.

[dkwo]

Sounds good. As for ci skip, I took it from your github pr template, perhaps it's worth fixing it there.