chore(deps): update dependency com.google.cloud:google-cloud-core to …

…v1.93.6 (#3162)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-core](https://github.com/googleapis/java-core) | patch | `1.93.5` -> `1.93.6` |

---

### Release Notes

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

### [`v1.93.6`](https://github.com/googleapis/java-core/blob/master/CHANGELOG.md#&#8203;1936-httpswwwgithubcomgoogleapisjava-corecomparev1935v1936-2020-06-12)

[Compare Source](https://github.com/googleapis/java-core/compare/v1.93.5...v1.93.6)

</details>

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iot/api-client/codelab/manager/pom.xml

@@ -77,7 +77,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>1.93.5</version>
+      <version>1.93.6</version>
     </dependency>
     <dependency>
       <groupId>com.google.guava</groupId>

iot/api-client/manager/pom.xml

@@ -72,7 +72,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>1.93.5</version>
+      <version>1.93.6</version>
     </dependency>
     <dependency>
       <groupId>com.google.auth</groupId>