PLAT-1431 Small README fixes

Author: tmuntaner

policies/harvester-pci-devices/README.md

@@ -50,7 +50,7 @@ spec:
 
 Here would be the result of the above policy.
 
-| namespace        | PCI Device ID       | Result |
+| Namespace        | PCI Device ID       | Result |
 |------------------|---------------------|--------|
 | test-ns-1        | tekton27a-000001010 | ALLOW  |
 | test-ns-2        | tekton27b-000001010 | ALLOW  |

policies/harvester-restricted-network-vm/README.md

@@ -52,7 +52,7 @@ spec:
 
 Here would be the result of the above policy.
 
-| namespace                   | network                               | Result |
+| Namespace                   | Network                               | Result |
 |-----------------------------|---------------------------------------|--------|
 | test-restricted-1-network-1 | test-restricted-1-network-1/network-1 | ALLOW  |
 | test-restricted-2-network-1 | test-restricted-1-network-1/network-1 | ALLOW  |

policies/harvester-restricted-network/README.md

@@ -49,9 +49,9 @@ spec:
   policyServer: default
 ```
 
-Here would be the result of the above policy.
+The following examples are with the example policy above, with a random non-restricted VLAN being 100.
 
-| namespace         | VLAN ID | Result |
+| Namespace         | VLAN ID | Result |
 |-------------------|---------|--------|
 | test-restricted-1 | 42      | ALLOW  |
 | test-restricted-2 | 1337    | ALLOW  |