Excavator: Upgrade Java dependency com.palantir.sls.versions:sls-versions (palantir#1770)

Author: svc-excavator-bot

versions.props

@@ -7,7 +7,7 @@ com.google.errorprone:error_prone_annotations = 2.47.0
 com.google.guava:guava = 33.7.1-jre
 com.google.guava:guava-testlib = 33.5.0-jre
 com.google.testing.compile:compile-testing = 0.23.0
-com.palantir.sls.versions:sls-versions = 1.17.0
+com.palantir.sls.versions:sls-versions = 1.18.0
 junit:junit = 4.13.2
 org.assertj:assertj-core = 3.27.7
 org.derive4j:* = 1.1.1