setup v4 (#5243)

Author: deekshas8

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,6 +2,8 @@
 
 Closes SAP/cloud-sdk-backlog#ISSUENUMBER.
 
+- [ ] I know which base branch I chose for this PR, as the default branch is `v3-main` now, which is not for v4 development.
+
 <!-- Check List:
 * Tests created/adjusted for your changes.
 * PR title adheres to [conventional commit guidelines](https://www.conventionalcommits.org).

.github/workflows/build.yml

@@ -183,7 +183,7 @@ jobs:
           yarn changeset pre enter ${date}
           yarn changeset version
           yarn changeset pre exit
-          yarn changeset publish --tag canary
+          yarn changeset publish --tag next
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPMJS_ACCESS_TOKEN }}
   draft-github-release: