pvmfw: README: Fix hyperlinks

Test: -
Change-Id: Ib8e9fd6bd86bb908e257c040463006aab75d743b
diff --git a/pvmfw/README.md b/pvmfw/README.md
index f46c718..1e4b605 100644
--- a/pvmfw/README.md
+++ b/pvmfw/README.md
@@ -214,7 +214,9 @@
 
 [AVB]: https://source.android.com/docs/security/features/verifiedboot/boot-flow
 [BccHandover]: https://pigweed.googlesource.com/open-dice/+/825e3beb6c/src/android/bcc.c#260
+[BccHandoverMainFlow]: https://pigweed.googlesource.com/open-dice/+/825e3beb6c/src/android/bcc.c#199
 [CDDL]: https://datatracker.ietf.org/doc/rfc8610
+[dice-mode]: https://pigweed.googlesource.com/open-dice/+/refs/heads/main/docs/specification.md#Mode-Value-Details
 [dice-dt]: https://www.kernel.org/doc/Documentation/devicetree/bindings/reserved-memory/google%2Copen-dice.yaml
 [Layering]: https://pigweed.googlesource.com/open-dice/+/refs/heads/main/docs/specification.md#layering-details
 [Trusty-BCC]: https://android.googlesource.com/trusty/lib/+/1696be0a8f3a7103/lib/hwbcc/common/swbcc.c#554