Release v8.0.3 binary still reports version 8.0.2+af145c25 in CLI and Web UI

### Description
The official linux-amd64 binary provided in the v8.0.3 release notes has incorrect version metadata injected during compilation. Both the CLI command and the Web UI report the version as 8.0.2.

### Steps to reproduce
1. Download the v8.0.3 binary: https://github.com/owncloud/ocis/releases/download/v8.0.3/ocis-8.0.3-linux-amd64
2. Check the version via CLI: `./ocis version`

### Actual behavior
Output shows:
Version: 8.0.2+af145c25
Compiled: 2026-05-11 00:00:00 +0000 UTC

File SHA256: bfd3ea9395c1720a6e430a1c799e63791145d051f375120adac86640902307ba

### Expected behavior
The version should be reported as 8.0.3. It seems the ldflags variable for the version was not updated in the CI/CD pipeline for the v8.0.3 tag.