deps: update dependency org.openjdk.jmh:jmh-core to v1.35 (#1789)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [org.openjdk.jmh:jmh-core](http://openjdk.java.net/projects/code-tools/jmh/) ([source](http://hg.openjdk.java.net/code-tools/jmh/)) | `1.34` -> `1.35` | [![age](https://badges.renovateapi.com/packages/maven/org.openjdk.jmh:jmh-core/1.35/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/org.openjdk.jmh:jmh-core/1.35/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/org.openjdk.jmh:jmh-core/1.35/compatibility-slim/1.34)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/org.openjdk.jmh:jmh-core/1.35/confidence-slim/1.34)](https://docs.renovatebot.com/merge-confidence/) |

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google-cloud-spanner/pom.xml

@@ -343,7 +343,7 @@
     <dependency>
       <groupId>org.openjdk.jmh</groupId>
       <artifactId>jmh-core</artifactId>
-      <version>1.34</version>
+      <version>1.35</version>
       <scope>test</scope>
     </dependency>
     <dependency>