update for branch starlark/v0.1 (#256)

Author: Mengqi Yu

examples/starlark/simple/README.md

@@ -31,7 +31,7 @@ Get the config example and try it out by running the following commands:
 
 <!-- @getAndRunPkg @test -->
 ```sh
-kpt pkg get https://github.com/GoogleContainerTools/kpt-functions-catalog.git/examples/starlark/simple .
+kpt pkg get https://github.com/GoogleContainerTools/kpt-functions-catalog.git/examples/starlark/simple@starlark/v0.1 .
 kpt fn run simple
 ```
 

functions/go/starlark/README.md

@@ -36,6 +36,6 @@ source: |
 
 <!--mdtogo:Examples-->
 
-https://github.com/GoogleContainerTools/kpt-functions-catalog/tree/master/examples/starlark/
+https://github.com/GoogleContainerTools/kpt-functions-catalog/tree/starlark/v0.1/examples/starlark/
 
 <!--mdtogo-->

functions/go/starlark/metadata.yaml

@@ -3,9 +3,9 @@ description: Execute a starlark script to mutate or validate resources.
 tags:
   - mutator
   - validator
-sourceURL: https://github.com/GoogleContainerTools/kpt-functions-catalog/tree/master/functions/go/starlark
+sourceURL: https://github.com/GoogleContainerTools/kpt-functions-catalog/tree/starlark/v0.1/functions/go/starlark
 examplePackageURLs:
-  - https://github.com/GoogleContainerTools/kpt-functions-catalog/tree/master/examples/starlark/simple
+  - https://github.com/GoogleContainerTools/kpt-functions-catalog/tree/starlark/v0.1/examples/starlark/simple
 emails:
   - kpt-team@google.com
 license: Apache-2.0