chore(deps): update dependency com.diffplug.spotless:spotless-maven-plugin to v2.40.0 (mulk/quarkus-googlecloud-jsonlogging!20)

This MR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [com.diffplug.spotless:spotless-maven-plugin](https://github.com/diffplug/spotless) | build | minor | `2.39.0` -> `2.40.0` |

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### Release Notes

<details>
<summary>diffplug/spotless</summary>

### [`v2.40.0`](https://github.com/diffplug/spotless/blob/HEAD/CHANGES.md#&#8203;2400---2023-07-17)

##### Added

-   Added support for Protobuf formatting based on [Buf](https://buf.build/). ([#&#8203;1208](diffplug/spotless#1208))
-   `enum OnMatch { INCLUDE, EXCLUDE }` so that `FormatterStep.filterByContent` can not only include based on the pattern but also exclude. ([#&#8203;1749](diffplug/spotless#1749))

##### Fixed

-   Update documented default `semanticSort` to `false`. ([#&#8203;1728](diffplug/spotless#1728))

##### Changes

-   Bump default `cleanthat` version to latest `2.13` -> `2.17`. ([#&#8203;1734](diffplug/spotless#1734))
-   Bump default `ktlint` version to latest `0.49.1` -> `0.50.0`. ([#&#8203;1741](diffplug/spotless#1741))
    -   Dropped support for `ktlint 0.47.x` following our policy of supporting two breaking changes at a time.
    -   Dropped support for deprecated `useExperimental` parameter in favor of the `ktlint_experimental` property.

</details>

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Author: Marge Bot

pom.xml

@@ -69,7 +69,7 @@ SPDX-License-Identifier: LGPL-3.0-or-later
     <maven-javadoc-plugin.version>3.6.0</maven-javadoc-plugin.version>
     <maven-source-plugin.version>3.3.0</maven-source-plugin.version>
     <nexus-staging-plugin.version>1.6.13</nexus-staging-plugin.version>
-    <spotless-plugin.version>2.39.0</spotless-plugin.version>
+    <spotless-plugin.version>2.40.0</spotless-plugin.version>
     <surefire-plugin.version>3.1.2</surefire-plugin.version>
 
     <quarkus.version>3.4.1</quarkus.version>