[doc] Update the link to the BCC specification

This cl updates the link to the BCC specification as the old link
pointed to the removed dice service code.

Test: N/A. Only comment change.
Bug: 268322533
Change-Id: I625bcd252a595cf897eaa9a30a8a10b84cc8c7dc
diff --git a/compos/aidl/com/android/compos/ICompOsService.aidl b/compos/aidl/com/android/compos/ICompOsService.aidl
index df8c91e..497c35e 100644
--- a/compos/aidl/com/android/compos/ICompOsService.aidl
+++ b/compos/aidl/com/android/compos/ICompOsService.aidl
@@ -87,7 +87,7 @@
     /**
      * Returns the attestation certificate chain of the current VM. The result is in the form of a
      * CBOR encoded Boot Certificate Chain (BCC) as defined in
-     * hardware/interfaces/security/dice/aidl/android/hardware/security/dice/Bcc.aidl.
+     * hardware/interfaces/security/rkp/aidl/android/hardware/security/keymint/ProtectedData.aidl
      */
     byte[] getAttestationChain();