Bump the gradle group across 1 directory with 6 updates (#1100)

Bumps the gradle group with 6 updates in the / directory:

| Package | From | To |
| --- | --- | --- |
| software.amazon.awssdk:retries-spi | `2.42.15` | `2.42.20` |
| software.amazon.awssdk:retries | `2.42.15` | `2.42.20` |
| software.amazon.awssdk:sdk-core | `2.42.15` | `2.42.20` |
| software.amazon.awssdk:auth | `2.42.15` | `2.42.20` |
| [io.netty:netty-all](https://github.com/netty/netty) | `4.2.10.Final` | `4.2.11.Final` |
| [com.diffplug.spotless:spotless-plugin-gradle](https://github.com/diffplug/spotless) | `8.3.0` | `8.4.0` |



Updates `software.amazon.awssdk:retries-spi` from 2.42.15 to 2.42.20

Updates `software.amazon.awssdk:retries` from 2.42.15 to 2.42.20

Updates `software.amazon.awssdk:sdk-core` from 2.42.15 to 2.42.20

Updates `software.amazon.awssdk:auth` from 2.42.15 to 2.42.20

Updates `software.amazon.awssdk:retries` from 2.42.15 to 2.42.20

Updates `software.amazon.awssdk:sdk-core` from 2.42.15 to 2.42.20

Updates `software.amazon.awssdk:auth` from 2.42.15 to 2.42.20

Updates `io.netty:netty-all` from 4.2.10.Final to 4.2.11.Final
- [Release notes](https://github.com/netty/netty/releases)
- [Commits](netty/netty@netty-4.2.10.Final...netty-4.2.11.Final)

Updates `com.diffplug.spotless:spotless-plugin-gradle` from 8.3.0 to 8.4.0
- [Release notes](https://github.com/diffplug/spotless/releases)
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@gradle/8.3.0...gradle/8.4.0)

---
updated-dependencies:
- dependency-name: software.amazon.awssdk:retries-spi
  dependency-version: 2.42.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
- dependency-name: software.amazon.awssdk:retries
  dependency-version: 2.42.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
- dependency-name: software.amazon.awssdk:sdk-core
  dependency-version: 2.42.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
- dependency-name: software.amazon.awssdk:auth
  dependency-version: 2.42.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
- dependency-name: software.amazon.awssdk:retries
  dependency-version: 2.42.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
- dependency-name: software.amazon.awssdk:sdk-core
  dependency-version: 2.42.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
- dependency-name: software.amazon.awssdk:auth
  dependency-version: 2.42.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
- dependency-name: io.netty:netty-all
  dependency-version: 4.2.11.Final
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
- dependency-name: com.diffplug.spotless:spotless-plugin-gradle
  dependency-version: 8.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -5,13 +5,13 @@ smithy = "1.68.0"
 jmh = "0.7.3"
 test-logger-plugin = "4.0.0"
 spotbugs = "6.0.22"
-spotless = "8.3.0"
+spotless = "8.4.0"
 smithy-gradle-plugins = "1.4.0"
 assertj = "3.27.7"
 jackson = "3.1.0"
-netty = "4.2.10.Final"
+netty = "4.2.11.Final"
 dep-analysis = "3.6.1"
-aws-sdk = "2.42.15"
+aws-sdk = "2.42.20"
 osdetector = "1.7.3"
 accp = "2.4.1" # Amazon Corretto Crypto Provider
 jreleaser = "1.23.0"