chore(deps): update api-diff-baseline to v1.7.0

Author: renovate[bot]

pom.xml

@@ -30,7 +30,7 @@
     <java.version>8</java.version>
     <test.java.version>25</test.java.version>
     <!-- renovate: datasource=maven packageName=io.prometheus:prometheus-metrics-core -->
-    <api.diff.baseline.version>1.6.1</api.diff.baseline.version>
+    <api.diff.baseline.version>1.7.0</api.diff.baseline.version>
     <jacoco.line-coverage>0.70</jacoco.line-coverage>
     <checkstyle.skip>false</checkstyle.skip>
     <coverage.skip>false</coverage.skip>