Bump org.apache.commons:commons-imaging

Bumps org.apache.commons:commons-imaging from 1.0.0-alpha5 to 1.0.0-alpha6.

---
updated-dependencies:
- dependency-name: org.apache.commons:commons-imaging
  dependency-version: 1.0.0-alpha6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

commons-math-examples/pom.xml

@@ -48,7 +48,7 @@
     <math.parent.dir>${basedir}/..</math.parent.dir>
     <math.jira.component>examples</math.jira.component>
 
-    <math.imaging.version>1.0.0-alpha5</math.imaging.version>
+    <math.imaging.version>1.0.0-alpha6</math.imaging.version>
     <math.picocli.version>4.7.6</math.picocli.version>
 
     <!-- Disable JApiCmp failures (but keep the report). The examples API is allowed to change. -->