Bump org.assertj:assertj-core from 3.23.1 to 3.25.1 in /spi-fly

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.23.1 to 3.25.1.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-core-3.23.1...assertj-build-3.25.1)

---
updated-dependencies:
- dependency-name: org.assertj:assertj-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

spi-fly/pom.xml

@@ -49,7 +49,7 @@
 
         <apache-rat-plugin.version>0.15</apache-rat-plugin.version>
         <asm.version>9.6</asm.version>
-        <assertj.version>3.23.1</assertj.version>
+        <assertj.version>3.25.1</assertj.version>
         <bnd.version>6.4.0</bnd.version>
         <easymock.version>4.3</easymock.version>
         <felix.framework.version>7.0.5</felix.framework.version>