fix(deps): update cel.version to v0.6.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.projectnessie.cel:cel-bom	0.6.0 → 0.6.1

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Release Notes

projectnessie/cel-java (org.projectnessie.cel:cel-bom)

v0.6.1: CEL-Java 0.6.1

Version 0.6.1

78 commits since 0.6.0

Full Changelog (minus dependabot/renovate commits):

• fix(interpreter): propagate unknown/error operands through == and != (#​865)
• Automatically adjust gradlew during Gradle Wrapper updates (#​813)

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