Pin Go 1.27.2 in aqua.yaml ahead of the limen v0.10.0 bump

[closer-claudio]

🎯 Why. limen v0.10.0's converge writes the Go pin into .aqua/aqua.yaml when it is missing, and Renovate rewrites that file on its own bump branch, so a limen bump on a repository whose main lacks the pin force-pushes in a loop (forkcloser/curl#50: 17 force-pushes). The pin therefore lands on main first, one PR per repository.

🛠️ What. just do tools add golang/go go1.27.2: one - name: golang/go@go1.27.2 line above the import in .aqua/aqua.yaml, and the checksums it adds. Nothing else.

🧪 How. V: the diff is the recipe's output and nothing else (git diff --stat: .aqua/aqua.yaml +1, .aqua/aqua-checksums.json). V: just lint and just test on the branch;

[closer-claudio]

✅ at 9746666: the Go toolchain pin seeded on main ahead of the limen v0.10.0 bump, so the bump's converge touches nothing Renovate owns and the branch stops looping.

• 🔍 Checked: .aqua/aqua.yaml gains the one line - name: golang/go@go1.27.2 above the import and loses nothing; .aqua/aqua-checksums.json gains 5 entries, each a go1.27.2 checksum verified against go.dev today; no other file. The limen lane is green, so the seed is where v0.10.0's missingBesidesImport wants it. ci green at this head.