ci: quote the two plain scalars that made this workflow invalid YAML

A plain YAML scalar cannot contain a colon followed by a space. Two step
values did, so the whole file failed to parse and Gitea skipped it: every
push left actions/runs and actions/tasks at zero. Quoting both values
makes the workflow parse; run 50815 is the same file with both values
quoted and it was picked up by the runner.

run: hourly RUN 2 2026-10-26T02:2xZ

.gitea/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
   ci:
     runs-on: node
     steps:
-      - name: fetch (probe: stock actions/checkout@v4)
+      - name: "fetch (probe: stock actions/checkout@v4)"
         id: actfetch
         continue-on-error: true
         uses: actions/checkout@v4
@@ -75,4 +75,4 @@ jobs:
           bash scripts/run_platform.sh --check-only contracts/static-assets.yml
           echo "check-only: OK"
       - name: summary
-        run: echo "=== CI stages complete: lint, test, check-only ==="
+        run: 'echo "=== CI stages complete: lint, test, check-only ==="'