chore(deps): update dependency github/gh-stack to v0.2.0 (#191)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.devcontainer/Dockerfile

@@ -182,7 +182,7 @@ COPY --from=actionlint-download /usr/local/bin/actionlint /usr/local/bin/actionl
 # ── gh-stack (native stacked PRs) ────────────────────────────────────────────
 # Installed as node so it lands in ~/.local/share/gh/extensions. See #160.
 # renovate: datasource=github-releases depName=github/gh-stack
-ARG GH_STACK_VERSION=0.1.1
+ARG GH_STACK_VERSION=0.2.0
 RUN gh extension install github/gh-stack --pin "v${GH_STACK_VERSION}"
 
 # ── Claude Code CLI ──────────────────────────────────────────────────────────

claude-code/.devcontainer/Dockerfile

@@ -206,7 +206,7 @@ USER node
 # Baked as node into ~/.local/share/gh/extensions, which is on the image layer (only
 # ~/.config/gh is a volume); a volume over ~/.local/share/gh would shadow it. See #160.
 # renovate: datasource=github-releases depName=github/gh-stack
-ARG GH_STACK_VERSION=0.1.1
+ARG GH_STACK_VERSION=0.2.0
 RUN gh extension install github/gh-stack --pin "v${GH_STACK_VERSION}"
 
 # ─── DEFAULT — full dev environment ───────────────────────────────────────────