fixup: RFC keyword

Signed-off-by: Todd Baert <[email protected]>

Author: toddbaert

specification.json

@@ -446,8 +446,8 @@
         {
             "id": "Requirement 2.5.2",
             "machine_id": "requirement_2_5_2",
-            "content": "After a provider's shutdown function has terminated successfully, the provider's state should revert to it's uninitialized state.",
-            "RFC 2119 keyword": null,
+            "content": "After a provider's shutdown function has terminated successfully, the provider's state MUST revert to it's uninitialized state.",
+            "RFC 2119 keyword": "MUST",
             "children": []
         },
         {

specification/sections/02-providers.md

@@ -255,7 +255,7 @@ class MyProvider implements Provider, AutoDisposable {
 
 #### Requirement 2.5.2
 
-> After a provider's shutdown function has terminated successfully, the provider's state should revert to it's uninitialized state.
+> After a provider's shutdown function has terminated successfully, the provider's state **MUST** revert to it's uninitialized state.
 
 If a provider requires initialization, once it's shut down, it should transition to it's initial `NOT_READY` state, so it can be reinitialized.
 Providers not requiring initialization are assumed to be ready at all times.