Bump org.apache.santuario:xmlsec from 2.2.3 to 2.2.6 (#89)

Bumps org.apache.santuario:xmlsec from 2.2.3 to 2.2.6.

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

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Co-authored-by: Manuel Blechschmidt <[email protected]>