deps: update dependency opentofu/opentofu to v1.8.8 (#825)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [opentofu/opentofu](https://redirect.github.com/opentofu/opentofu) |
patch | `v1.8.7` -> `v1.8.8` |

---

### Release Notes

<details>
<summary>opentofu/opentofu (opentofu/opentofu)</summary>

###
[`v1.8.8`](https://redirect.github.com/opentofu/opentofu/compare/v1.8.7...v1.8.8)

[Compare
Source](https://redirect.github.com/opentofu/opentofu/compare/v1.8.7...v1.8.8)

</details>

---

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rebase/retry checkbox.

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---

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---

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.github/workflows/test.yml

@@ -65,7 +65,7 @@ jobs:
 
       - uses: opentofu/setup-opentofu@v1
         with:
-          tofu_version: v1.8.7 # renovate: datasource=github-releases depName=opentofu/opentofu
+          tofu_version: v1.8.8 # renovate: datasource=github-releases depName=opentofu/opentofu
           tofu_wrapper: false
 
       - uses: docker/setup-buildx-action@v3
@@ -147,7 +147,7 @@ jobs:
 
       - uses: opentofu/setup-opentofu@v1
         with:
-          tofu_version: v1.8.7 # renovate: datasource=github-releases depName=opentofu/opentofu
+          tofu_version: v1.8.8 # renovate: datasource=github-releases depName=opentofu/opentofu
           tofu_wrapper: false
 
       - uses: docker/setup-buildx-action@v3