deps: update dependency io.grpc:grpc-stub to v1.49.1 (#428)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [io.grpc:grpc-stub](https://togithub.com/grpc/grpc-java) | `1.49.0` -> `1.49.1` | [![age](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.49.1/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.49.1/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.49.1/compatibility-slim/1.49.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.49.1/confidence-slim/1.49.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v1.49.1`](https://togithub.com/grpc/grpc-java/compare/v1.49.0...v1.49.1)

</details>

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Author: renovate-bot

grpc-google-iam-v1/build.gradle

@@ -18,7 +18,7 @@ repositories {
 }
 
 dependencies {
-  compile 'io.grpc:grpc-stub:1.49.0'
+  compile 'io.grpc:grpc-stub:1.49.1'
   compile 'io.grpc:grpc-protobuf:1.49.1'
   compile project(':proto-google-iam-v1')
 }