deps: update google.core.version to v2.8.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.cloud:google-cloud-core	2.7.1 -> 2.8.0
com.google.cloud:google-cloud-core-bom	2.7.1 -> 2.8.0

---

Release Notes

googleapis/java-core

v2.8.0

Compare Source

Features

• add build scripts for native image testing in Java 17 (#​1440) (#​836) (8826d9b)

Dependencies

• update dependency com.google.api-client:google-api-client-bom to v1.35.1 (#​843) (9ffe0c5)
• update dependency com.google.api:api-common to v2.2.1 (#​844) (69dde56)
• update dependency com.google.api:gax-bom to v2.18.2 (#​849) (11764b0)
• update dependency com.google.api.grpc:proto-google-common-protos to v2.9.0 (#​846) (5dced6d)
• update dependency com.google.api.grpc:proto-google-iam-v1 to v1.4.0 (#​838) (b0a7afe)
• update dependency com.google.api.grpc:proto-google-iam-v1 to v1.4.1 (#​848) (8260997)
• update dependency com.google.errorprone:error_prone_annotations to v2.14.0 (#​839) (3459fb6)
• update dependency com.google.http-client:google-http-client-bom to v1.42.0 (#​845) (2d2c873)
• update dependency com.google.protobuf:protobuf-bom to v3.21.0 (#​840) (037da15)
• update dependency com.google.protobuf:protobuf-bom to v3.21.1 (#​841) (04b8862)
• update dependency io.grpc:grpc-bom to v1.47.0 (#​842) (40984e2)

2.7.1 (2022-05-19)

Dependencies

• update dependency com.google.api:gax-bom to v2.18.1 (#​833) (7541115)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

---

• If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by Mend Renovate. View repository job log here.