deps: update dependency com.google.flogger:flogger-system-backend to v0.7.2 (#983)

[![WhiteSource Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.flogger:flogger-system-backend](https://togithub.com/google/flogger) | `0.7.1` -> `0.7.2` | [![age](https://badges.renovateapi.com/packages/maven/com.google.flogger:flogger-system-backend/0.7.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.flogger:flogger-system-backend/0.7.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.flogger:flogger-system-backend/0.7.2/compatibility-slim/0.7.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.flogger:flogger-system-backend/0.7.2/confidence-slim/0.7.1)](https://docs.renovatebot.com/merge-confidence/) |

---

### Configuration

📅 **Schedule**: At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Renovate will not automatically rebase this PR, because other commits have been found.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by [WhiteSource Renovate](https://renovate.whitesourcesoftware.com). View repository job log [here](https://app.renovatebot.com/dashboard#github/googleapis/java-pubsublite).

Author: renovate-bot

google-cloud-pubsublite/pom.xml

@@ -98,7 +98,7 @@
     <dependency>
       <groupId>com.google.flogger</groupId>
       <artifactId>flogger-system-backend</artifactId>
-      <version>0.7.1</version>
+      <version>0.7.2</version>
       <scope>runtime</scope>
     </dependency>