Bump jib-maven-plugin from 3.2.0 to 3.2.1

Bumps [jib-maven-plugin](https://github.com/GoogleContainerTools/jib) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/GoogleContainerTools/jib/releases)
- [Commits](https://github.com/GoogleContainerTools/jib/commits)

---
updated-dependencies:
- dependency-name: com.google.cloud.tools:jib-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -33,7 +33,7 @@
     <jacoco.file.minimum-coverage-ratio>0.75</jacoco.file.minimum-coverage-ratio>
     <java.target.version>11</java.target.version>
     <jdepend-maven-plugin.version>2.0</jdepend-maven-plugin.version>
-    <jib-maven-plugin.version>3.2.0</jib-maven-plugin.version>
+    <jib-maven-plugin.version>3.2.1</jib-maven-plugin.version>
     <jsr305.version>3.0.2</jsr305.version>
     <junit-jupiter.version>5.8.2</junit-jupiter.version>
     <junit.version>4.13.2</junit.version>