fix(gittensor-impact): switch to branch-mode publishing

GitHub now creates gh-release-created releases as immutable, so the
action's default release publish-mode fails every run with HTTP 422
(Cannot upload assets to an immutable release) right after creating it.
Branch mode force-pushes the SVGs to a dedicated orphan branch instead,
which isn't subject to release immutability.

Author: JSONbored

.github/workflows/gittensor-impact.yml

@@ -17,8 +17,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     # Scoped here rather than at workflow level (defense-in-depth): this is the
-    # only job that needs write access, to publish SVG assets to the pinned
-    # `gittensor-impact` release via matthewevans/gittensor-impact-action.
+    # only job that needs write access, to push SVG assets to the dedicated
+    # gittensor-impact-assets branch via matthewevans/gittensor-impact-action.
     permissions:
       contents: write
     # matthewevans/gittensor-impact-action is a ~1.5-day-old repo; require a
@@ -29,3 +29,8 @@ jobs:
         uses: matthewevans/gittensor-impact-action@397fd470899cba47367458289a374eea9cb0d76a # main, 2026-07-06 (#1 per-repo API endpoint)
         with:
           title: Gittensory
+          # GitHub's release-asset uploads now reject re-uploads to an
+          # immutable release (HTTP 422), which the action's default
+          # release publish-mode hits every run. Branch mode force-pushes
+          # the SVGs to a dedicated orphan branch instead, sidestepping it.
+          publish-mode: branch