Bump elixir.yml cache version to fix a test

[macobo]

A test in test/plausible_web/plugs/tracker_test.exs was failing due to cached version of tracker script being used in other PRs.

The reason it didn't fail in the original PR adding the test was that changes in tracker script bypassed the cache for that pr. The old cached data was still used for other PRs, causing them to fail.

[aerosol]

What's the reason for local failures though?

[macobo]

I wasn't able to reproduce a local failure - the first time was because script compilation was still running. 🤦

Do you still receive the same error if you do the following commands:

cd tracker
rm -rf node_modules/
npm i
npm run deploy
cd ..
mix test test/plausible_web/plugs/tracker_test.exs

If you do, what does ls -laht --full-time priv/tracker/js/ | grep -E "plausible.js|plausible.pageleave.js" report?

[aerosol]

the first time was because script compilation was still running.

that must've been it here as well. It does not give any indication of running so I must've assumed it was idle...