Updated the note format of documents

Signed-off-by: Aditya Kumar <aditya.kumar60@infosys.com>

docs/auth/add-auth-provider.md

@@ -4,10 +4,14 @@ title: Contributing New Providers
 description: Documentation on adding new authentication providers
 ---
 
-> NOTE: The primary audience for this documentation are contributors to the main
-> Backstage project that want to add support for new authentication providers.
-> While you can follow it to implement your own custom providers it is much
-> more advanced than using our built-in providers.
+:::note Note
+
+The primary audience for this documentation are contributors to the main
+Backstage project that want to add support for new authentication providers.
+While you can follow it to implement your own custom providers it is much
+more advanced than using our built-in providers.
+
+:::
 
 ## How Does Authentication Work?
 

docs/auth/service-to-service-auth.md

@@ -156,8 +156,12 @@ payload:
 - `sub`: the exact string "backstage-server"
 - `exp`: one hour from the time it was generated, in epoch seconds
 
-> NOTE: The JWT must encode the `alg` header as a protected header, such as with
-> [setProtectedHeader](https://github.com/panva/jose/blob/main/docs/classes/jwt_sign.SignJWT.md#setprotectedheader).
+:::note Note
+
+The JWT must encode the `alg` header as a protected header, such as with
+[setProtectedHeader](https://github.com/panva/jose/blob/main/docs/classes/jwt_sign.SignJWT.md#setprotectedheader).
+
+:::
 
 The caller then passes along the JWT token with requests in the `Authorization`
 header: