Update links to buf.build/docs to use protovalidate.com (#62)

Updates links from buf.build/docs to use protovalidate.com. I have
previewed the updated Markdown files within GitHub, opening each link to
check for 404s/accuracy.

Author: jrinehart-buf

README.md

@@ -105,8 +105,8 @@ Offered under the [Apache 2 license][license].
 [license]: LICENSE
 [contributing]: .github/CONTRIBUTING.md
 [protoc-gen-validate]: https://github.com/bufbuild/protoc-gen-validate
-[protovalidate]: https://buf.build/docs/protovalidate
-[quickstart]: https://buf.build/docs/protovalidate/quickstart/
+[protovalidate]: https://protovalidate.com
+[quickstart]: https://protovalidate.com/quickstart/
 [conformance-executable]: ./packages/protovalidate-testing/README.md
 [validate-proto]: https://buf.build/bufbuild/protovalidate/docs/main:buf.validate
 [conformance]: https://github.com/bufbuild/protovalidate/blob/main/docs/conformance.md

packages/example/README.md

@@ -34,7 +34,7 @@ Modify the transfer in [src/basic.ts](./src/index.ts) and re-run the example to
 
 ### Valid types
 
-Protovalidate rules can modify TypeScript types. A message field annotated with protovalidate's [`required` rule](https://buf.build/docs/reference/protovalidate/rules/field_rules/#required) becomes a required property.
+Protovalidate rules can modify TypeScript types. A message field annotated with Protovalidate's [`required` rule](https://protovalidate.com/reference/rules/field_rules/#required) becomes a required property.
 
 See [order.proto](./proto/store/v1/order.proto) and [src/valid-types.ts](./src/valid-types.ts) for an example,
 and take a look at the [Valid types](https://github.com/bufbuild/protobuf-es/blob/v2.6.1/MANUAL.md#valid-types)

packages/protovalidate/README.md

@@ -54,6 +54,6 @@ if (result.kind !== "valid") {
 >
 > It requires the Protobuf runtime [@bufbuild/protobuf](https://www.npmjs.com/package/@bufbuild/protobuf).
 
-[protovalidate]: https://buf.build/docs/protovalidate
+[protovalidate]: https://protovalidate.com
 [cel]: https://cel.dev
 [protoc-gen-validate]: https://github.com/bufbuild/protoc-gen-validate