build(deps): bump the slack group in /block-kit with 2 updates

Bumps the slack group in /block-kit with 2 updates: [com.slack.api:slack-api-model](https://github.com/slackapi/java-slack-sdk) and [com.slack.api:slack-api-client](https://github.com/slackapi/java-slack-sdk).


Updates `com.slack.api:slack-api-model` from 1.47.0 to 1.48.0
- [Release notes](https://github.com/slackapi/java-slack-sdk/releases)
- [Commits](slackapi/java-slack-sdk@v1.47.0...v1.48.0)

Updates `com.slack.api:slack-api-client` from 1.47.0 to 1.48.0
- [Release notes](https://github.com/slackapi/java-slack-sdk/releases)
- [Commits](slackapi/java-slack-sdk@v1.47.0...v1.48.0)

---
updated-dependencies:
- dependency-name: com.slack.api:slack-api-model
  dependency-version: 1.48.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: slack
- dependency-name: com.slack.api:slack-api-client
  dependency-version: 1.48.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: slack
...

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

Author: dependabot[bot]

block-kit/pom.xml

@@ -63,12 +63,12 @@
     <dependency>
       <groupId>com.slack.api</groupId>
       <artifactId>slack-api-model</artifactId>
-      <version>1.47.0</version>
+      <version>1.48.0</version>
     </dependency>
     <dependency>
       <groupId>com.slack.api</groupId>
       <artifactId>slack-api-client</artifactId>
-      <version>1.47.0</version>
+      <version>1.48.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>