docs: Say to use v2 claims. Update support statement (#1496)

* docs: Say to use v2 vs. v2 claims. Update support statement

* Update release-notes.md

Author: crandmck

README.md

@@ -46,7 +46,7 @@ For details on what you can do with the library, see [Using the Rust library](ht
 
 This is a beta release (version 0.x.x) of the project. The minor version number (0.x.0) is incremented when there are breaking API changes, which may happen frequently.
 
-**NOTE**: The library now supports [C2PA v2 claims](https://c2pa.org/specifications/specifications/2.2/specs/C2PA_Specification.html#_claims), however development is still in progress and all features are not fully implemented yet. While you can experiment with this functionality, it is not recommended for production use at this time.  For details, see [C2PA v2 claims](https://opensource.contentauthenticity.org/docs/rust-sdk/docs/release-notes#c2pa-v2-claims).
+**NOTE**: The library supports [C2PA v2 claims](https://c2pa.org/specifications/specifications/2.2/specs/C2PA_Specification.html#_claims) by default, and implementations should not generate deprecated v1 claims.  For details, see [C2PA v2 claims](https://opensource.contentauthenticity.org/docs/rust-sdk/docs/release-notes#c2pa-v2-claims).
 
 ### New API
 

docs/release-notes.md

@@ -24,15 +24,12 @@ An `AssetType` assertion is now supported.
 
 ### C2PA v2 claims
 
-**NOTE**: The library now supports [C2PA v2 claims](https://c2pa.org/specifications/specifications/2.2/specs/C2PA_Specification.html#_claims) by default.
+**NOTE**: The library now supports [C2PA v2 claims](https://c2pa.org/specifications/specifications/2.2/specs/C2PA_Specification.html#_claims) by default. V2 claims have many new checks and status codes.  Additionally:
 
-To generate v1 claims, set the `Builder` manifest definition `claim_version` field to `1`.
+- The `title()` and `format()` methods of both `Manifest` and `Ingredient` objects now return an `Option<String>` because in v2 claims, `title` is optional and `format` does not exist.
+- The first `action` must be `c2pa.created` or `c2pa.opened` (which requires an ingredient). 
 
-The `title()` and `format()` methods of both `Manifest` and `Ingredient` objects now return an `Option<String>` because in v2 claims, `title` is optional and `format` does not exist.
-
-In v2 claims, the first `action` must be `c2pa.created` or `c2pa.opened`. 
-
-V2 claims have many new checks and status codes.
+WARNING: Implementations should not generate deprecated v1 claims.  If needed, though, you can generate v1 claims by setting the `Builder` manifest definition `claim_version` field to `1`.
 
 ### Using the old API
 
@@ -42,7 +39,7 @@ To use the old deprecated API, enable the `v1_api` feature; for example:
 c2pa = {version="0.45.2", features=["v1_api"]}
 ```
 
-This will be the last release with the v1_api feature available.
+This will be the last release with the `v1_api` feature available.
 
 ## Language binding support