fix(deps): update dependency com.google.cloud:cloud-spanner-r2dbc to v1.2.2 (#8224)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:cloud-spanner-r2dbc](https://togithub.com/GoogleCloudPlatform/cloud-spanner-r2dbc/tree/main/cloud-spanner-r2dbc) ([source](https://togithub.com/GoogleCloudPlatform/cloud-spanner-r2dbc)) | `1.2.1` -> `1.2.2` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:cloud-spanner-r2dbc/1.2.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:cloud-spanner-r2dbc/1.2.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:cloud-spanner-r2dbc/1.2.2/compatibility-slim/1.2.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:cloud-spanner-r2dbc/1.2.2/confidence-slim/1.2.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>GoogleCloudPlatform/cloud-spanner-r2dbc</summary>

### [`v1.2.2`](https://togithub.com/GoogleCloudPlatform/cloud-spanner-r2dbc/blob/HEAD/CHANGELOG.md#&#8203;122-httpsgithubcomGoogleCloudPlatformcloud-spanner-r2dbccomparev121v122-2023-06-02)

[Compare Source](https://togithub.com/GoogleCloudPlatform/cloud-spanner-r2dbc/compare/v1.2.1...v1.2.2)

##### Bug Fixes

-   Context loss after applying com.google.cloud.spanner.r2dbc.v2.SpannerClientLibraryStatement ([#&#8203;690](https://togithub.com/GoogleCloudPlatform/cloud-spanner-r2dbc/issues/690)) ([93a34e0](https://togithub.com/GoogleCloudPlatform/cloud-spanner-r2dbc/commit/93a34e0e3450196c509df18cd6f182e97548bfd4))

</details>

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Author: renovate-bot

spanner/r2dbc/pom.xml

@@ -61,7 +61,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>cloud-spanner-r2dbc</artifactId>
-      <version>1.2.1</version>
+      <version>1.2.2</version>
     </dependency>
     <!-- [END spanner_r2dbc_dependency] -->