adding hashi docs to exclude list for link checking

+ looks like hashi's edge is potentially bot challenging requests from CI

Author: michelleN

.build/check-broken-links.sh

@@ -76,7 +76,9 @@ blc --recursive http://127.0.0.1:3000
     --exclude 'https://docs.github.com/en/authentication/managing-commit-signature-verification/about-commit-signature-verification'                                                        \
     --exclude 'https://twitter.com/spinframework'                                                                                                                                           \
     --exclude 'https://linux.die.net/man/1/which'                                                                                                                                           \
-                                                                                                                                                                                            \
+    `## returns 429`                                                                                                                                                                        \
+    --exclude 'https://developer.hashicorp.com/vault/docs/secrets/kv/kv-v2'                                                                                                                 \
+    --exclude 'https://developer.hashicorp.com/vault/tutorials/get-started/install-binary'                                                                                                  \                                                                                                                                                                                                                                                                                                                                                                                                                                                
     `## false positives`                                                                                                                                                                    \
     --exclude 'https://www.gnu.org/software/coreutils/'                                                                                                                                     \
     --exclude 'https://crates.io/'                                                                                                                                                          \