docs(readme): add jsr and notes on constraints

README.md

@@ -168,8 +168,13 @@ we may implement registry-specific routines for them:
 
 - [x] [deno.land/std](https://deno.land/std)
 - [x] [deno.land/x](https://deno.land/x)
+- [x] [jsr](https://jsr.io) (via `jsr:` specifier)
 - [x] [npm](https://www.npmjs.com) (via `npm:` specifier)
 
+> [!NOTE]\
+> Version constraints like `~1.2.3` and `^1.2.3` in `npm:` and `jrs:` specifiers
+> are not updated.
+
 ### Third-party registries
 
 Molt also works with the following third-party registries:
@@ -196,8 +201,8 @@ TBW
 
 The following limitations are imposed by the design of Molt:
 
-- Dependencies are always updated to the latest versions. No version constraints
-  are supported.
+- Dependencies are always updated to the latest versions. Version constraints
+  are not handled.
 - Dependencies in import specifiers are only targeted.
 
 See [issues] for other known limitations.