deps: update dependency com.google.cloud:google-cloud-secretmanager-b…

…om to v1.2.3 (#1047)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-secretmanager-bom](https://togithub.com/googleapis/java-secretmanager) | patch | `1.2.1` -> `1.2.3` |

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### Release Notes

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

### [`v1.2.3`](https://togithub.com/googleapis/java-secretmanager/blob/master/CHANGELOG.md#&#8203;123-httpswwwgithubcomgoogleapisjava-secretmanagercomparev122v123-2020-10-21)

[Compare Source](https://togithub.com/googleapis/java-secretmanager/compare/v1.2.2...v1.2.3)

### [`v1.2.2`](https://togithub.com/googleapis/java-secretmanager/blob/master/CHANGELOG.md#&#8203;122-httpswwwgithubcomgoogleapisjava-secretmanagercomparev121v122-2020-10-19)

[Compare Source](https://togithub.com/googleapis/java-secretmanager/compare/v1.2.1...v1.2.2)

</details>

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

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pom.xml

@@ -450,7 +450,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-secretmanager-bom</artifactId>
-        <version>1.2.1</version>
+        <version>1.2.3</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>