link updates

Author: ryanfoxtyler

dgraph/sdks/overview.mdx

@@ -15,7 +15,7 @@ If you are interested in clients for GraphQL endpoint, please refer to
 [GraphQL clients](/dgraph/graphql/connecting) section.
 
 Go, python, Java, C# and JavaScript clients are using
-**[gRPC](http://www.grpc.io/):** protocol and
+**[gRPC](https://grpc.io/):** protocol and
 [Protocol Buffers](https://developers.google.com/protocol-buffers) (the .proto
 file used by Dgraph is located at
 [api.proto](https://github.com/hypermodeinc/dgo/blob/main/protos/api.proto)).

dgraph/self-managed/decrypt.mdx

@@ -29,7 +29,7 @@ determine the AES cypher used for encryption and decryption, as follows:
 The `decrypt` command also supports the use of
 [HashiCorp Vault](https://www.vaultproject.io/) to store secrets, including
 support for Vault's
-[AppRole authentication](https://www.vaultproject.io/docs/auth/approle.html).
+[AppRole authentication](https://developer.hashicorp.com/vault/docs/auth/approle).
 
 ## Decryption options
 

introduction.mdx

@@ -47,13 +47,13 @@ them together as your complete backend.
 Hypermode leads and builds on a strong foundation of open source projects:
 
 <CardGroup cols={4}>
-  <Card title="Modus" icon="" href="/modus">
+  <Card title="Modus" icon="" href="/modus/overview">
     An agent framework in Go with auto-generated AI APIs
   </Card>
-  <Card title="Dgraph" icon="" href="https://dgraph.io">
+  <Card title="Dgraph" icon="" href="/dgraph/overview">
     A graph database most commonly used for building knowledge graphs
   </Card>
-  <Card title="Badger" icon="" href="/badger">
+  <Card title="Badger" icon="" href="/badger/overview">
     An embeddable key-value store in Go
   </Card>
   <Card