chore(deps): update renovate/renovate docker tag to v37.6 (#131)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [renovate/renovate](https://github.com/renovatebot/renovate) | minor | `37.5` -> `37.6` |

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### ⚠ Dependency Lookup Warnings ⚠

Warnings were logged while processing this repo. Please check the logs for more information.

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### Configuration

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

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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy41LjMiLCJ1cGRhdGVkSW5WZXIiOiIzNy41LjMiLCJ0YXJnZXRCcmFuY2giOiJtYWluIn0=-->

Reviewed-on: https://git.home/nrdufour/home-ops/pulls/131
Co-authored-by: Renovate <[email protected]>
Co-committed-by: Renovate <[email protected]>

kubernetes/main/apps/default/renovate/app/cronjobs.yaml

@@ -13,7 +13,7 @@ spec:
         spec:
           containers:
             - name: renovate
-              image: renovate/renovate:37.5
+              image: renovate/renovate:37.6
               args:
                 - nrdufour/home-ops
               # Environment Variables
@@ -49,7 +49,7 @@ spec:
         spec:
           containers:
             - name: renovate
-              image: renovate/renovate:37.5
+              image: renovate/renovate:37.6
               args:
                 - nrdufour/mqtt-apps
               # Environment Variables
@@ -85,7 +85,7 @@ spec:
         spec:
           containers:
             - name: renovate
-              image: renovate/renovate:37.5
+              image: renovate/renovate:37.6
               args:
                 - nrdufour/marmitton
               # Environment Variables