fix(github): tolerate rate-limited version lookup in the action

Composite bash steps run with -e -o pipefail, so a failed
unauthenticated curl to api.github.com (shared runner IPs regularly
exhaust the 60/hr limit) kills the step before the ${VERSION:-latest}
fallback on the next line can apply. Authenticate the lookup with
github.token and let the pipeline fail soft so the documented fallback
is actually reachable.

Author: sfmullen

github/action.yml

@@ -44,8 +44,10 @@ runs:
     - name: Get opencode version
       id: version
       shell: bash
+      env:
+        GH_TOKEN: ${{ github.token }}
       run: |
-        VERSION=$(curl -sf https://api.github.com/repos/anomalyco/opencode/releases/latest | grep -o '"tag_name": *"[^"]*"' | cut -d'"' -f4)
+        VERSION=$(curl -sf -H "Authorization: Bearer $GH_TOKEN" https://api.github.com/repos/anomalyco/opencode/releases/latest | grep -o '"tag_name": *"[^"]*"' | cut -d'"' -f4 || true)
         echo "version=${VERSION:-latest}" >> $GITHUB_OUTPUT
 
     - name: Cache opencode