test(SpdxDocumentFile): Use correct checksumValue for external document

As the issue is caused by an external document reference, it wasn't
reported as an issue. The previous commit fixes this issue.
Therefore, fix the checksum to keep the correct expected result for the
`SpdxDocumentFileFunTest`.

Signed-off-by: Marcel Bochtler <marcel.bochtler@bosch.com>

plugins/package-managers/spdx/src/funTest/assets/projects/synthetic/subproject-conan/project-xyz.spdx.yml

@@ -16,7 +16,7 @@ externalDocumentRefs:
     spdxDocument: "./subproject/subproject-with-conan-reference.spdx.yml"
     checksum:
       algorithm: "SHA1"
-      checksumValue: "53840294281f7d1bf401b746162da11dcf9306eb"
+      checksumValue: "032a087b0da8f353c03671a72179b807b4ec7eb3"
 packages:
   - SPDXID: "SPDXRef-Package-xyz"
     description: "Awesome product created by Example Inc."