fix(osv): Actually use the Credit.Type enum

See [1].

[1]: https://ossf.github.io/osv-schema/#creditstype-field

Signed-off-by: Sebastian Schuberth <sebastian@doubleopen.org>

Author: sschuberth

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

@@ -89,7 +89,8 @@ data class Affected(
 @Serializable
 data class Credit(
     val name: String,
-    val contact: List<String> = emptyList()
+    val contact: List<String> = emptyList(),
+    val type: Type? = null
 ) {
     enum class Type {
         ANALYST,