Fix a bunch of links to master docs

We really should go back to git branches...

Signed-off-by: Nic Cope <[email protected]>

Author: negz

content/v2.0-preview/composition/composition-revisions.md

@@ -449,7 +449,7 @@ vpc-staging   True     myvpcs.aws.example.upbound.io-727b3c8   Automatic   map[c
 {{< /hint >}}
 
 
-[composition type]: {{<ref "../../master/concepts/compositions" >}}
-[Compositions]: {{<ref "../../master/concepts/compositions" >}}
+[composition type]: {{<ref "compositions">}}
+[Compositions]: {{<ref "compositions">}}
 [canary]: https://martinfowler.com/bliki/CanaryRelease.html
-[install guide]: {{<ref "../../master/get-started/install" >}}
+[install guide]: {{<ref "../get-started/install">}}

content/v2.0-preview/guides/troubleshoot-crossplane.md

@@ -209,7 +209,7 @@ has some useful information.
 [Pausing Providers]: #pausing-providers
 [Deleting When a Resource Hangs]: #deleting-when-a-resource-hangs
 [Installing Crossplane Package]: #installing-crossplane-package
-[Crossplane package]: /master/concepts/packages/
+[Crossplane package]: {{<ref "../packages/packages/">}}
 [Handling Crossplane Package Dependency]: #handling-crossplane-package-dependency
 [semver spec]: https://github.com/Masterminds/semver#basic-comparisons
 

content/v2.0-preview/packages/image-configs.md

@@ -138,7 +138,7 @@ contains the configuration for verifying the attestations of the images.
 The `ImageConfig` API follows the same API shape as [Policy Controller](https://docs.sigstore.dev/policy-controller/overview/)
 from [Sigstore](https://docs.sigstore.dev/). Crossplane initially supports a
 subset of the Policy Controller configuration options which can be found in the
-[API reference](https://docs.crossplane.io/master/api/#ImageConfig-spec-verification-cosign)
+[API reference]({{<ref "../api/#ImageConfig-spec-verification-cosign">}})
 for the `ImageConfig` resource together with their descriptions.
 
 When multiple authorities are provided, the package manager verifies the