fix(osv): Align Reference.Type with spec version 1.6.0

The `Osv` backend returns JSON data compliant with spec version 1.6.0,
while ORT's handling hasn't been updated to that (latest) version.

For example, the root cause of [2] is that `Reference.Type` is lacking
the value `EVIDENCE`.

Align only the values of `Reference.Type` with version 1.6.0 in order to
fix [2] quickly. In a future change, remaining alignments, if any,
should be made.

[1] https://github.com/ossf/osv-schema/blob/v1.6.0/validation/schema.json
[2] #7531

Signed-off-by: Frank Viernau <[email protected]>

Author: fviernau

clients/osv/src/main/kotlin/Model.kt

@@ -164,7 +164,12 @@ data class Reference(
     enum class Type {
         ADVISORY,
         ARTICLE,
+        DETECTION,
+        DISCUSSION,
+        EVIDENCE,
         FIX,
+        GIT,
+        INTRODUCED,
         PACKAGE,
         REPORT,
         WEB