Bump com.sap.cds:cds-feature-attachments from 1.5.0 to 1.6.0 in /sdm

Bumps [com.sap.cds:cds-feature-attachments](https://github.com/cap-java/cds-feature-attachments) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/cap-java/cds-feature-attachments/releases)
- [Changelog](https://github.com/cap-java/cds-feature-attachments/blob/main/doc/CHANGELOG.md)
- [Commits](cap-java/cds-feature-attachments@1.5.0...1.6.0)

---
updated-dependencies:
- dependency-name: com.sap.cds:cds-feature-attachments
  dependency-version: 1.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

sdm/pom.xml

@@ -34,7 +34,7 @@
         <test-generation-folder>src/test/gen</test-generation-folder>
         <maven.compiler.source>17</maven.compiler.source>
         <maven.compiler.target>17</maven.compiler.target>
-        <attachments_version>1.5.0</attachments_version>
+        <attachments_version>1.6.0</attachments_version>
         <lombok.version>1.18.36</lombok.version>
         <jacoco.version>0.8.7</jacoco.version>
         <ehcache-version>3.10.8</ehcache-version>