Bump org.apache.xmlgraphics:fop from 2.2 to 2.9

Bumps org.apache.xmlgraphics:fop from 2.2 to 2.9.

---
updated-dependencies:
- dependency-name: org.apache.xmlgraphics:fop
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 522bccb..304c42c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -103,7 +103,7 @@
     <org.apache.mina.bundleversion>2.1.3</org.apache.mina.bundleversion>
     <org.apache.poi.version>3.9</org.apache.poi.version>
     <org.apache.poi.bundleversion>3.9.0</org.apache.poi.bundleversion>
-    <org.apache.xmlgraphics.fop.version>2.2</org.apache.xmlgraphics.fop.version>
+    <org.apache.xmlgraphics.fop.version>2.9</org.apache.xmlgraphics.fop.version>
     <org.bouncycastle.version>1.62</org.bouncycastle.version>
     <org.slf4j.version>1.7.25</org.slf4j.version>
     <org.slf4j.bundleversion>1.7.25</org.slf4j.bundleversion>