Bump org.apache.santuario:xmlsec from 2.1.8 to 2.2.6 (#862)

Bumps org.apache.santuario:xmlsec from 2.1.8 to 2.2.6.

---
updated-dependencies:
- dependency-name: org.apache.santuario:xmlsec
  dependency-type: direct:production
...

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

pom.xml

@@ -283,7 +283,7 @@
         <txw2.version>2.4.0-b180830.0438</txw2.version>
         <velocity.version>2.3</velocity.version>
         <woodstox-core.version>6.4.0</woodstox-core.version>
-        <xmlsec.version>2.1.8</xmlsec.version>
+        <xmlsec.version>2.2.6</xmlsec.version>
         <xmltool.version>3.3</xmltool.version>
         <xml-jaxb.version>2.3.0</xml-jaxb.version>
         <xml-matchers.version>0.10</xml-matchers.version>