chore(deps): bump actions/setup-go from v5.5.0 to v5.6.0 (#61)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/setup-go](https://redirect.github.com/actions/setup-go) |
action | minor | `v5.5.0` → `v5.6.0` |

---
> [!WARNING]
> #### Deprecated preset: `Kong/public-shared-renovate:backend`
>
> Your config references a deprecated preset. To prevent disruption,
this file now builds on the org default (`Kong/public-shared-renovate`)
and layers a few backend-specific tweaks so behavior stays close to the
historical backend configuration.
>
> #### What's different from the default
>
> - Early Monday schedule windows (`schedule:earlyMondays`)
> - Automerge disabled for all updates (`:automergeDisabled`)
> - Renovate rate limiting disabled (`:disableRateLimiting`)
> - Standardized commit messages (semantic type `chore` and clear bump
from → to subjects)
>
> #### Recommended migration
>
> Prefer switching to the default preset and applying only the bits you
still need locally. Example configuration to replicate this preset's
behavior on top of the default:
>
> ```json
> {
>   "extends": [
>     "Kong/public-shared-renovate",
>     "schedule:earlyMondays",
>     ":automergeDisabled",
>     ":disableRateLimiting",
>     ":semanticCommitTypeAll(chore)"
>   ],
>   "packageRules": [
>     {
>       "matchPackageNames": ["*"],
>       "commitMessageAction": "bump",
>       "commitMessageLowerCase": "never",
>       "commitMessageTopic": "actions/setup-go",
>       "commitMessageExtra": "from v5.5.0 to v5.6.0"
>     }
>   ]
> }
> ```
>
> #### Timeline
>
> This compatibility alias will be removed in **January 2026**. Please
migrate to the default preset with local overrides before then.

---

### Release Notes

<details>
<summary>actions/setup-go (actions/setup-go)</summary>

###
[`v5.6.0`](https://redirect.github.com/actions/setup-go/releases/tag/v5.6.0)

[Compare
Source](https://redirect.github.com/actions/setup-go/compare/v5.5.0...v5.6.0)

##### What's Changed

- Fall back to downloading from go.dev/dl instead of
storage.googleapis.com/golang by
[@&#8203;aparnajyothi-y](https://redirect.github.com/aparnajyothi-y) in
[#&#8203;689](https://redirect.github.com/actions/setup-go/pull/689)

**Full Changelog**:
<actions/setup-go@v5...v5.6.0>

</details>

---

### Configuration

📅 **Schedule**: Branch creation - Between 12:00 AM and 03:59 AM, only on
Monday ( * 0-3 * * 1 ) (UTC), Automerge - At any time (no schedule
defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/Kong/shared-speakeasy).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi41OS4wIiwidXBkYXRlZEluVmVyIjoiNDIuNjYuMTQiLCJ0YXJnZXRCcmFuY2giOiJtYWluIiwibGFiZWxzIjpbImRlcGVuZGVuY2llcyJdfQ==-->

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

Author: renovate[bot]

.github/workflows/lint.yaml

@@ -12,7 +12,7 @@ jobs:
       - name: Checkout Source Code
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Setup go
-        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5.6.0
         with:
           go-version: '^1.24'
       - run: make install-tools

.github/workflows/test.yaml

@@ -12,7 +12,7 @@ jobs:
       - name: Checkout Source Code
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Setup go
-        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5.6.0
         with:
           go-version: '^1.24'
       - run: make install-tools