deps: update dependency com.google.cloud:google-cloud-core to v1.94.4 (#349)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-core](https://togithub.com/googleapis/java-core) | `1.94.1` -> `1.94.4` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/1.94.4/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/1.94.4/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/1.94.4/compatibility-slim/1.94.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/1.94.4/confidence-slim/1.94.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v1.94.4`](https://togithub.com/googleapis/java-core/blob/master/CHANGELOG.md#&#8203;1944-httpswwwgithubcomgoogleapisjava-corecomparev1943v1944-2021-03-11)

[Compare Source](https://togithub.com/googleapis/java-core/compare/v1.94.3...v1.94.4)

### [`v1.94.3`](https://togithub.com/googleapis/java-core/blob/master/CHANGELOG.md#&#8203;1943-httpswwwgithubcomgoogleapisjava-corecomparev1942v1943-2021-03-02)

[Compare Source](https://togithub.com/googleapis/java-core/compare/v1.94.2...v1.94.3)

### [`v1.94.2`](https://togithub.com/googleapis/java-core/blob/master/CHANGELOG.md#&#8203;1942-httpswwwgithubcomgoogleapisjava-corecomparev1941v1942-2021-03-01)

[Compare Source](https://togithub.com/googleapis/java-core/compare/v1.94.1...v1.94.2)

</details>

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Author: renovate-bot

samples/install-without-bom/pom.xml

@@ -48,7 +48,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>1.94.1</version>
+      <version>1.94.4</version>
       <classifier>tests</classifier>
     </dependency>
   </dependencies>

samples/snapshot/pom.xml

@@ -46,7 +46,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>1.94.1</version>
+      <version>1.94.4</version>
       <classifier>tests</classifier>
     </dependency>
   </dependencies>

samples/snippets/pom.xml

@@ -59,7 +59,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>1.94.1</version>
+      <version>1.94.4</version>
       <classifier>tests</classifier>
     </dependency>
   </dependencies>