Bump spekVersion from 2.0.15 to 2.0.17 in /samples/jvm/spek

Bumps `spekVersion` from 2.0.15 to 2.0.17.

Updates `spek-dsl-jvm` from 2.0.15 to 2.0.17
- [Release notes](https://github.com/spekframework/spek/releases)
- [Changelog](https://github.com/spekframework/spek/blob/2.x/docs/breaking-changes.md)
- [Commits](https://github.com/spekframework/spek/compare/2.0.15...2.0.17)

Updates `spek-runner-junit5` from 2.0.15 to 2.0.17
- [Release notes](https://github.com/spekframework/spek/releases)
- [Changelog](https://github.com/spekframework/spek/blob/2.x/docs/breaking-changes.md)
- [Commits](https://github.com/spekframework/spek/compare/2.0.15...2.0.17)

---
updated-dependencies:
- dependency-name: org.spekframework.spek2:spek-dsl-jvm
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.spekframework.spek2:spek-runner-junit5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

samples/jvm/spek/build.gradle.kts

@@ -4,7 +4,7 @@
 import org.gradle.api.tasks.testing.logging.TestExceptionFormat
 
 val atriumVersion = "0.16.0"
-val spekVersion = "2.0.15"
+val spekVersion = "2.0.17"
 
 plugins {
     kotlin("jvm") version "1.5.21"