Update action references to new supertokens/actions monorepo

The standalone action repos have been consolidated into supertokens/actions. Workflow files in this repo need to update their uses: references.

Files to update

Workflow	Old reference	New reference
.github/workflows/dev-tag.yml	supertokens/get-core-dependencies-action@main	supertokens/actions/get-core-dependencies-action@main
.github/workflows/add-dev-tag.yml	supertokens/get-core-dependencies-action@main	supertokens/actions/get-core-dependencies-action@main
.github/workflows/do-release.yml	supertokens/get-core-dependencies-action@main	supertokens/actions/get-core-dependencies-action@main
.github/workflows/publish-dev-docker.yml	supertokens/get-core-dependencies-action@main	supertokens/actions/get-core-dependencies-action@main
.github/workflows/unit-test.yml	supertokens/get-core-dependencies-action@main	supertokens/actions/get-core-dependencies-action@main