chore(deps): bump slack-api-client from 1.25.1 to 1.26.1

Bumps [slack-api-client](https://github.com/slackapi/java-slack-sdk) from 1.25.1 to 1.26.1.
- [Release notes](https://github.com/slackapi/java-slack-sdk/releases)
- [Changelog](https://github.com/slackapi/java-slack-sdk/blob/main/jSlack_changelog.md)
- [Commits](slackapi/java-slack-sdk@v1.25.1...v1.26.1)

---
updated-dependencies:
- dependency-name: com.slack.api:slack-api-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
PR #412

Author: dependabot[bot]

iris-backend-service/pom.xml

@@ -124,7 +124,7 @@
 		<dependency>
 			<groupId>com.slack.api</groupId>
 			<artifactId>slack-api-client</artifactId>
-			<version>1.25.1</version>
+			<version>1.26.1</version>
 		</dependency>
 		<dependency>
 			<groupId>com.googlecode.libphonenumber</groupId>