build(deps): update dependency com.google.cloud:google-cloud-shared-c…

…onfig to v0.9.4 (#267)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-shared-config](https://togithub.com/googleapis/java-shared-config) | patch | `0.9.3` -> `0.9.4` |

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### Release Notes

<details>
<summary>googleapis/java-shared-config</summary>

### [`v0.9.4`](https://togithub.com/googleapis/java-shared-config/blob/master/CHANGELOG.md#&#8203;094-httpswwwgithubcomgoogleapisjava-shared-configcomparev093v094-2020-10-21)

[Compare Source](https://togithub.com/googleapis/java-shared-config/compare/v0.9.3...v0.9.4)

</details>

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### Renovate configuration

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

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

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

:no_bell: **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

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google-cloud-phishingprotection-bom/pom.xml

@@ -8,7 +8,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-shared-config</artifactId>
-    <version>0.9.3</version>
+    <version>0.9.4</version>
   </parent>
 
   <name>Google Cloud phishingprotection BOM</name>

pom.xml

@@ -14,7 +14,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-shared-config</artifactId>
-    <version>0.9.3</version>
+    <version>0.9.4</version>
   </parent>
 
   <developers>