Bump the prod-deps group with 4 updates (#428)

Bumps the prod-deps group with 4 updates: [org.kiwiproject:kiwi-parent](https://github.com/kiwiproject/kiwi-parent), [org.kiwiproject:kiwi-bom](https://github.com/kiwiproject/kiwi-bom), [org.kiwiproject:kiwi](https://github.com/kiwiproject/kiwi) and [org.kiwiproject:metrics-healthchecks-severity](https://github.com/kiwiproject/metrics-healthchecks-severity).


Updates `org.kiwiproject:kiwi-parent` from 3.0.20 to 3.0.21
- [Release notes](https://github.com/kiwiproject/kiwi-parent/releases)
- [Commits](kiwiproject/kiwi-parent@v3.0.20...v3.0.21)

Updates `org.kiwiproject:kiwi-bom` from 2.0.18 to 2.0.20
- [Release notes](https://github.com/kiwiproject/kiwi-bom/releases)
- [Commits](kiwiproject/kiwi-bom@v2.0.18...v2.0.20)

Updates `org.kiwiproject:kiwi` from 4.5.2 to 4.6.1
- [Release notes](https://github.com/kiwiproject/kiwi/releases)
- [Commits](kiwiproject/kiwi@v4.5.2...v4.6.1)

Updates `org.kiwiproject:metrics-healthchecks-severity` from 2.0.7 to 2.0.8
- [Release notes](https://github.com/kiwiproject/metrics-healthchecks-severity/releases)
- [Commits](kiwiproject/metrics-healthchecks-severity@v2.0.7...v2.0.8)

---
updated-dependencies:
- dependency-name: org.kiwiproject:kiwi-parent
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: prod-deps
- dependency-name: org.kiwiproject:kiwi-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: prod-deps
- dependency-name: org.kiwiproject:kiwi
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: prod-deps
- dependency-name: org.kiwiproject:metrics-healthchecks-severity
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: prod-deps
...

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

pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.kiwiproject</groupId>
         <artifactId>kiwi-parent</artifactId>
-        <version>3.0.20</version>
+        <version>3.0.21</version>
     </parent>
 
     <artifactId>dropwizard-application-errors</artifactId>
@@ -29,9 +29,9 @@
     <properties>
 
         <!-- Versions for required dependencies -->
-        <kiwi.version>4.5.2</kiwi.version>
-        <kiwi-bom.version>2.0.18</kiwi-bom.version>
-        <metrics-healthchecks-severity.version>2.0.7</metrics-healthchecks-severity.version>
+        <kiwi.version>4.6.1</kiwi.version>
+        <kiwi-bom.version>2.0.20</kiwi-bom.version>
+        <metrics-healthchecks-severity.version>2.0.8</metrics-healthchecks-severity.version>
 
         <!-- Versions for test dependencies -->
         <kiwi-test.version>3.8.0</kiwi-test.version>