Update extension after Firefox 128 ESR is no longer available

[juliandescottes]

See https://searchfox.org/mozilla-central/rev/1d3c8311925d252ae79c223a53b65e667c810805/devtools/server/actors/root.js#138-146

// @backward-compat { version 142 } Process Descriptor's `getWatcher()`
// supports a new 'enableWindowGlobalThreadActors' flag to enable
// the WindowGlobal's thread actors when debugging the whole browser.
// This was actually changed in 137, but we support it for VSCode until
// ESR 140 is the only ESR available.
// This should happen when Firefox 143 gets released.
// Contact Holger Benl (hbenl) to make sure the VS Code extension is
// updated.
supportsEnableWindowGlobalThreadActors: true,

@hbenl can you please close this issue once the extension is updated to assume that all servers supportsEnableWindowGlobalThreadActors by default, without checking the trait?

That should only be done once ESR128 is EOL (https://whattrainisitnow.com/release/?version=esr). Currently that's September 16 2025.