fix(ci): skip permissioned workflows on external PRs

[thmsobrmlr]

Problem

After https://github.com/PostHog/posthog/pull/33717, external PRs can be merged again. However there are still some failing workflows, see: https://github.com/PostHog/posthog/pull/33576

Changes

Adapts the config to skip them on external PRs.

How did you test this code?

CI run

[github-actions[bot]]

Size Change: 0 B

Total Size: 2.58 MB

ℹ️ View Unchanged

Filename	Size
frontend/dist/toolbar.js	2.58 MB

_{compressed-size-action}

[haacked]

I think the greptile comments are worth addressing. Otherwise, the changes look good to me!

[thmsobrmlr]

I think the greptile comments are worth addressing. Otherwise, the changes look good to me!

Agree. Done!

[posthog-bot]

📸 UI snapshots have been updated

1 snapshot changes in total. 0 added, 1 modified, 0 deleted:

• chromium: 0 added, 1 modified, 0 deleted (diff for shard 2)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

[!CAUTION]

Detected flapping snapshots

These snapshots have auto-updated more than once since the last human commit:

• scenes-app-insights-funnels--funnel-top-to-bottom-breakdown-edit--light.png (chromium, shard 2)

The flippy-flappies are deadly and must be fixed ASAP. They're productivity killers. Run pnpm storybook locally and make the fix now. (Often, the cause is ResizeObserver being used instead of the better CSS container queries.)

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 2)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[posthog-bot]

📸 UI snapshots have been updated

1 snapshot changes in total. 0 added, 1 modified, 0 deleted:

[!CAUTION]

Detected flapping snapshots

These snapshots have auto-updated more than once since the last human commit:

• scenes-app-insights-funnels--funnel-top-to-bottom-breakdown--light.png (chromium, shard 2)

The flippy-flappies are deadly and must be fixed ASAP. They're productivity killers. Run pnpm storybook locally and make the fix now. (Often, the cause is ResizeObserver being used instead of the better CSS container queries.)

• chromium: 0 added, 1 modified, 0 deleted (diff for shard 2)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.