Cleanup kbs docs

Fix typos and broken links

Signed-off-by: Dan Middleton <dmiddleton@nvidia.com>

Author: dcmiddle

deps/policy-engine/test_data/policy_5.rego

@@ -18,7 +18,7 @@ allow if {
 
     data["resource-path"][0] == "myrepo"
     data["resource-path"][1] == "secret"
-    # check that the secret name exists and tht the minimum svn is met
+    # check that the secret name exists and that the minimum svn is met
     resources[data["resource-path"][2]] <= input["submods"]["cpu0"]["ear.veraison.annotated-evidence"]["sample"]["svn"]
 
 }

kbs/README.md

@@ -179,6 +179,11 @@ The [resource storage backend](./docs/resource_storage_backend.md) where KBS sto
 ### Config
 A custom, [JSON-formatted configuration file](./docs/config.md) can be provided to configure KBS.
 
+### Policies
+[Sample policies](./sample_policies/) can be used as a starting point for writing
+your own resource policy. Additional example policies used by the policy engine
+tests are in [`deps/policy-engine/test_data/`](../deps/policy-engine/test_data/).
+
 ### Attestation Token Verification
 How KBS verifies attestation tokens, configures trust anchors, and relates AS
 token signing to KBS `[attestation_token]` settings is documented in

kbs/docs/resource_storage_backend.md

@@ -75,6 +75,6 @@ echo -n "hello" | gcloud secrets versions add my-test --data-file=-
 # the resource kbs:///default/default/my-test
 ```
 
-### Hashicorp Vault Backend
+### HashiCorp Vault / OpenBao Backend
 
 [Vault KV secrets engine backend](./vault_kv.md)

kbs/sample_policies/README.md

@@ -1,7 +1,7 @@
 This directory contains sample policy files to configure the policy engine
 of the KBS. You can use these files to write your own policies.
 
-There are also several example policies used [for testing](../test/data). 
+There are also several example policies used [for testing](../../deps/policy-engine/test_data/). 
 
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