Revert Symbolic links for now

articles/ros2_security_contexts.md

@@ -69,16 +69,16 @@ keystore
 │   └── ca.key.pem
 └── public
     ├── ca.cert.pem
-    ├── identity_ca.cert.pem -> ca.cert.pem
-    └── permissions_ca.cert.pem -> ca.cert.pem
+    ├── identity_ca.cert.pem
+    └── permissions_ca.cert.pem
 ```
 
 
 ### `public`
 
 The `public` directory contains anything permissable as public, such as public certificates for the identity or permissions certificate authorities.
 As such, this can be given read access to all executables.
-Note that in the default case, both the identity_ca and permissions_ca points to the same CA certificate.
+Note that in the default case, both the identity_ca and permissions_ca are the same CA certificate.
 
 ### `private`
 
@@ -111,9 +111,9 @@ $ tree contexts/
 contexts/
 ├── cert.pem
 ├── governance.p7s
-├── identity_ca.cert.pem -> ../public/identity_ca.cert.pem
+├── identity_ca.cert.pem
 ├── key.pem
-├── permissions_ca.cert.pem -> ../public/permissions_ca.cert.pem
+├── permissions_ca.cert.pem
 └── permissions.p7s
 ```
 
@@ -148,7 +148,6 @@ contexts/
 ├── permissions_ca.cert.pem
 └── permissions.p7s
 ```
-> Symbolic links suppressed for readability
 
 ### Relatively pushed qualified context path