deps: update iam.version to v1.6.23 (#954)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.api.grpc:grpc-google-iam-v1](https://github.com/googleapis/java-iam/grpc-google-iam-v1) ([source](https://github.com/googleapis/java-iam)) | `1.6.22` -> `1.6.23` | [![age](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:grpc-google-iam-v1/1.6.23/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:grpc-google-iam-v1/1.6.23/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:grpc-google-iam-v1/1.6.23/compatibility-slim/1.6.22)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:grpc-google-iam-v1/1.6.23/confidence-slim/1.6.22)](https://docs.renovatebot.com/merge-confidence/) |
| [com.google.api.grpc:proto-google-iam-v1](https://github.com/googleapis/java-iam/proto-google-iam-v1) ([source](https://github.com/googleapis/java-iam)) | `1.6.22` -> `1.6.23` | [![age](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:proto-google-iam-v1/1.6.23/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:proto-google-iam-v1/1.6.23/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:proto-google-iam-v1/1.6.23/compatibility-slim/1.6.22)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.api.grpc:proto-google-iam-v1/1.6.23/confidence-slim/1.6.22)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

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

### [`v1.6.23`](https://github.com/googleapis/java-iam/blob/HEAD/CHANGELOG.md#&#8203;1623-httpsgithubcomgoogleapisjava-iamcomparev1622v1623-2022-12-20)

[Compare Source](https://github.com/googleapis/java-iam/compare/v1.6.22...v1.6.23)

##### Dependencies

-   Update dependency com.google.api:api-common to v2.3.1 ([#&#8203;567](https://github.com/googleapis/java-iam/issues/567)) ([17e62e8](https://github.com/googleapis/java-iam/commit/17e62e80f0ea8c2d4edfe6bb16ef5ee7acbc22f3))
-   Update dependency com.google.auth:google-auth-library-oauth2-http to v1.14.0 ([#&#8203;571](https://github.com/googleapis/java-iam/issues/571)) ([9c48311](https://github.com/googleapis/java-iam/commit/9c48311fbac25f9c9545f3404a42cdadf8ebb243))
-   Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.1.0 ([#&#8203;565](https://github.com/googleapis/java-iam/issues/565)) ([32be2fb](https://github.com/googleapis/java-iam/commit/32be2fb0cfafa3681489c18e367cf12f22c567d3))
-   Update dependency com.google.cloud:google-iam-policy to v1.6.22 ([#&#8203;560](https://github.com/googleapis/java-iam/issues/560)) ([de39d89](https://github.com/googleapis/java-iam/commit/de39d89c08c9e45bc977ea393570a8d01cf48af2))
-   Update dependency com.google.protobuf:protobuf-bom to v3.21.12 ([#&#8203;563](https://github.com/googleapis/java-iam/issues/563)) ([607e260](https://github.com/googleapis/java-iam/commit/607e2601b71ff1fb51406e6c97dd79208296f404))
-   Update dependency com.google.protobuf:protobuf-java to v3.21.12 ([#&#8203;564](https://github.com/googleapis/java-iam/issues/564)) ([4b2b26b](https://github.com/googleapis/java-iam/commit/4b2b26bd29d88ccb602a71225d6e2decb49b9649))
-   Update dependency io.grpc:grpc-protobuf to v1.51.1 ([#&#8203;573](https://github.com/googleapis/java-iam/issues/573)) ([2143ec8](https://github.com/googleapis/java-iam/commit/2143ec8a90dbcdb128dffea9777fa9d183c3068e))
-   Update dependency io.grpc:grpc-stub to v1.51.1 ([#&#8203;574](https://github.com/googleapis/java-iam/issues/574)) ([488496a](https://github.com/googleapis/java-iam/commit/488496aa09c9d976bf0c450fb8584f07e7c74c03))

</details>

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java-shared-dependencies/first-party-dependencies/pom.xml

@@ -68,7 +68,7 @@
     <google.http-client.version>1.42.3</google.http-client.version>
     <google.oauth-client.version>1.34.1</google.oauth-client.version>
     <google.api-client.version>2.1.1</google.api-client.version>
-    <iam.version>1.6.22</iam.version>
+    <iam.version>1.6.23</iam.version>
   </properties>
 
   <dependencyManagement>