deps: update dependency com.google.cloud:google-cloud-core to v2.0.3 (#833)

[![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.cloud:google-cloud-core](https://togithub.com/googleapis/java-core) | `2.0.2` -> `2.0.3` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.0.3/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.0.3/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.0.3/compatibility-slim/2.0.2)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.0.3/confidence-slim/2.0.2)](https://docs.renovatebot.com/merge-confidence/) |

***

### Release Notes

<details>
<summary>googleapis/java-core</summary>

### [`v2.0.3`](https://togithub.com/googleapis/java-core/blob/master/CHANGELOG.md#​203-httpswwwgithubcomgoogleapisjava-corecomparev202v203-2021-08-10)

[Compare Source](https://togithub.com/googleapis/java-core/compare/v2.0.2...v2.0.3)

</details>

***

### Configuration

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

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

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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

***

*   \[ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box.

***

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-asset).

Author: renovate-bot

samples/install-without-bom/pom.xml

@@ -36,7 +36,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.0.2</version>
+      <version>2.0.3</version>
     </dependency>
     <dependency>
       <groupId>com.google.cloud</groupId>

samples/snapshot/pom.xml

@@ -35,7 +35,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.0.2</version>
+      <version>2.0.3</version>
     </dependency>
     <dependency>
       <groupId>com.google.cloud</groupId>