LEDG-67 updating contrib links (corda#7036)

Author: vlajos

.github/PULL_REQUEST_TEMPLATE.md

@@ -3,9 +3,9 @@
 
 # PR Checklist:
 
-- [ ] Have you run the unit, integration and smoke tests as described [here](https://docs.corda.net/head/testing.html)?
-- [ ] If you added public APIs, did you write the JavaDocs?
-- [ ] If the changes are of interest to application developers, have you added them to the [changelog](https://docs.corda.net/head/changelog.html) (`/docs/source/changelog.rst`), and potentially the [release notes](https://docs.corda.net/head/release-notes.html) (`/docs/source/release-notes.rst`)?
-- [ ] If you are contributing for the first time, please read the [contributor agreement](https://docs.corda.net/head/contributing.html) now and add a comment to this pull request stating that your PR is in accordance with the [Developer's Certificate of Origin](https://docs.corda.net/head/contributing.html#merging-the-changes-back-into-corda).
+- [ ] Have you run the unit, integration and smoke tests as described [here](https://docs.r3.com/en/platform/corda/4.8/open-source/testing.html)?
+- [ ] If you added public APIs, did you write the JavaDocs/kdocs?
+- [ ] If the changes are of interest to application developers, have you added them to the changelog, and potentially the [release notes](https://docs.corda.net/head/release-notes.html) (`https://docs.r3.com/en/platform/corda/4.8/open-source/release-notes.html`)?
+- [ ] If you are contributing for the first time, please read the [contributor agreement](https://docs.r3.com/en/platform/corda/4.8/open-source/contributing.html) now and add a comment to this pull request stating that your PR is in accordance with the [Developer's Certificate of Origin](https://docs.r3.com/en/platform/corda/4.8/open-source/contributing.html#merging-the-changes-back-into-corda).
 
 Thanks for your code, it's appreciated! :)

CONTRIBUTING.md

@@ -2,4 +2,4 @@
 
 Corda is an open-source project and contributions are welcome!
 
-To find out how to contribute, please see our [contributing docs](https://docs.corda.net/head/contributing-index.html).
+To find out how to contribute, please see our [contributing docs](https://docs.r3.com/en/platform/corda/4.8/open-source/contributing.html).

README.md

@@ -39,7 +39,7 @@ Corda is an open source blockchain project, designed for business from the start
 
 Corda is an open-source project and contributions are welcome!
 
-To find out how to contribute, please see our [contributing docs](https://docs.corda.net/head/contributing-index.html).
+To find out how to contribute, please see our [contributing docs](https://docs.r3.com/en/platform/corda/4.8/open-source/contributing.html).
 
 ## License