Update Legacy Content

This commit cleans up the legacy content from the current [central catalog repo][central-catalog-repo], reflecting the new decentralized catalog model, git-based versioning testing strategy.

[central-catalog-repo]: https://github.com/tektoncd/catalog

.github/PULL_REQUEST_TEMPLATE/pull_request_template.md

@@ -10,7 +10,7 @@ your descriptive commit message(s)! -->
 These are the criteria that every PR should meet, please check them off as you
 review them:
 
-- [ ] Follows the [authoring recommendations][authoring]
+- [ ] Follows the [authoring recommendations](../../recommendations.md)
 - [ ] Includes [docs][docs] (if user facing)
 - [ ] Includes [tests][tests] (for new tasks or changed functionality)
   - See the [end-to-end testing documentation][e2e] for guidance and CI details.
@@ -20,9 +20,10 @@ review them:
   contains `/kind <type>`. Valid types are bug, cleanup, design, documentation,
   feature, flake, misc, question, tep
 - [ ] Complies with [Catalog Organization TEP][TEP], see [example]. **Note** [An issue has been filed to automate this validation][validation]
-  - [ ] File path follows  `<kind>/<name>/<version>/name.yaml`
-  - [ ] Has `README.md` at `<kind>/<name>/<version>/README.md`
+  - [ ] File path follows  `<kind>/<name>/name.yaml`
+  - [ ] Has `README.md` at `<kind>/<name>/README.md`
   - [ ] Has mandatory `metadata.labels` - `app.kubernetes.io/version` the same as the `<version>` of the resource
+    - The `<version>` should follow semantic versioning strategy (e.g. `<major>.<minor>.<patch>`)
   - [ ] Has mandatory `metadata.annotations` `tekton.dev/pipelines.minVersion`
   - [ ] mandatory `spec.description` follows the convention
 
@@ -35,14 +36,15 @@ review them:
               Paragraph(s) to describe the resource.
           ```
 
-_See [the contribution guide](https://github.com/tektoncd/catalog/blob/master/CONTRIBUTING.md) for more details._
+_See [the contribution guide][catalog-contributor] for more details._
 
 [TEP]: https://github.com/tektoncd/community/blob/master/teps/0003-tekton-catalog-organization.md
-[example]: https://github.com/tektoncd/catalog/tree/master/task/git-clone/0.1
+[example]: https://github.com/tektoncd-catalog/golang
 [validation]: https://github.com/tektoncd/catalog/issues/413
 [authoring]: https://github.com/tektoncd/catalog/blob/main/recommendations.md
 [docs]: https://github.com/tektoncd/community/blob/master/standards.md#docs
 [tests]: https://github.com/tektoncd/community/blob/master/standards.md#tests
-[e2e]: https://github.com/tektoncd/catalog/blob/main/CONTRIBUTING.md#end-to-end-testing
+[e2e]: ../../CONTRIBUTING.md#end-to-end-testing
 [contributor]: https://github.com/tektoncd/community/blob/main/standards.md
-[commit]: https://github.com/tektoncd/community/blob/master/standards.md#commit-messages
+[commit]: https://github.com/tektoncd/community/blob/master/standards.md#commit-messages
+[catalog-contributor]: ../../CONTRIBUTING.md