Restore missing title on solace-rabbit-shovel codelab

[Mrc0113]

Problem

The solace-rabbit-shovel codelab renders with no title in the top bar.

The generated index.html has an empty <title></title> and <google-codelab title="">. The <google-codelab title=...> attribute is what the JS renders into the title bar, so an empty value = no title shown. (The landing-page card still shows the title because that comes from codelab.json, which is correct.)

Root cause

Commit 5e20516 ("modify info boxes (#251)") blanked the title attribute in this file:

- title="Bridge data from RabbitMQ to Solace PubSub+"
+ title=""

Because this codelab has no markdown source in the repo, claat never regenerated it, so the blank title was never restored.

Fix

Restore both the <title> and the <google-codelab title=...> from the authoritative codelab.json value ("Bridge data from RabbitMQ to Solace PubSub+"), matching claat's original HTML-entity encoding (+ for the trailing +). Two lines; direct HTML edit since there is no markdown to regenerate from.

Verify after deploy

Open https://codelabs.solace.dev/codelabs/solace-rabbit-shovel/ — the title "Bridge data from RabbitMQ to Solace PubSub+" now appears in the top bar and browser tab.

🤖 Generated with Claude Code

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[Mrc0113]

Admin-merging: same deadlock as #407 — master requires the Build_Preview check, but its workflow (netlify.yml) is path-filtered to markdown/** and never fires for a codelabs-only change. The two checks that can run both passed. Deploy still needs a submodule bump in solace-dev-codelabs-site.