deps: update core dependencies to v1.27.1 (#47)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [io.grpc:grpc-stub](https://togithub.com/grpc/grpc-java) | patch | `1.27.0` -> `1.27.1` |
| [io.grpc:grpc-protobuf](https://togithub.com/grpc/grpc-java) | patch | `1.27.0` -> `1.27.1` |
| [io.grpc:grpc-api](https://togithub.com/grpc/grpc-java) | patch | `1.27.0` -> `1.27.1` |
| [io.grpc:grpc-bom](https://togithub.com/grpc/grpc-java) | patch | `1.27.0` -> `1.27.1` |

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### Release Notes

<details>
<summary>grpc/grpc-java</summary>

### [`v1.27.1`](https://togithub.com/grpc/grpc-java/releases/v1.27.1)

[Compare Source](https://togithub.com/grpc/grpc-java/compare/v1.27.0...v1.27.1)

#### Bug Fixes

-   alts: Fix using the wrong way of checking if Conscrypt is available ([#&#8203;6672](https://togithub.com/grpc/grpc-java/issues/6672))

</details>

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pom.xml

@@ -60,7 +60,7 @@
   </licenses>
   <properties>
     <site.installationModule>grafeas</site.installationModule>
-    <grpc.version>1.27.0</grpc.version>
+    <grpc.version>1.27.1</grpc.version>
     <api-client.version>1.30.8</api-client.version>
     <google.core.version>1.92.5</google.core.version>
     <gax.version>1.53.1</gax.version>