Fix broken link (Azure#39708)

Author: mccoyp

doc/dev/tests.md

@@ -594,7 +594,7 @@ For information about more advanced testing scenarios, refer to the [advanced te
 [generate_sas]: https://github.com/Azure/azure-sdk-for-python/blob/bf4749babb363e2dc972775f4408036e31f361b4/tools/azure-sdk-tools/devtools_testutils/azure_recorded_testcase.py#L196
 [get_credential]: https://github.com/Azure/azure-sdk-for-python/blob/20cf5b0bd9b87f90bd5ad4fd36358d3b257f95c5/tools/azure-sdk-tools/devtools_testutils/azure_recorded_testcase.py#L96
 [git_setup]: https://git-scm.com/book/en/v2/Getting-Started-First-Time-Git-Setup
-[kv_test_resources]: https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/keyvault/test-resources.json
+[kv_test_resources]: https://github.com/Azure/azure-sdk-for-python/blob/fbdb860630bcc13c1e355828231161849a9bd5a4/sdk/keyvault/test-resources.json
 [kv_test_resources_outputs]: https://github.com/Azure/azure-sdk-for-python/blob/fbdb860630bcc13c1e355828231161849a9bd5a4/sdk/keyvault/test-resources.json#L255
 [kv_test_resources_resources]: https://github.com/Azure/azure-sdk-for-python/blob/fbdb860630bcc13c1e355828231161849a9bd5a4/sdk/keyvault/test-resources.json#L116
 [manage_recordings]: https://github.com/Azure/azure-sdk-for-python/blob/main/scripts/manage_recordings.py