test(docs): temporarily widen workflow for E2E testing

Add `experiments/**` branch trigger and `experiments/publish-docs` to
the allowlist so the full pipeline (including `combine` and
`trigger-aggregator`) runs on push. Revert before merge.

Author: danceratopz

.github/configs/docs-branches.yaml

@@ -12,3 +12,6 @@ default: "forks/amsterdam"
 branches:
   - path: "forks/amsterdam"
     label: "Amsterdam"
+  # TEMPORARY: remove after E2E testing
+  - path: "experiments/publish-docs"
+    label: "Amsterdam"

.github/workflows/docs-build.yaml

@@ -21,6 +21,7 @@ on:
       - "devnets/**"
       - "eips/**"
       - "projects/**"
+      - "experiments/**"  # TEMPORARY: remove after E2E testing
     paths: &docs_paths
       - "src/ethereum/**"
       - "src/ethereum_spec_tools/docc.py"