ci: do not start tracking master branch

Not exactly sure what this does, but it was specified in the `nx` docs:
https://nx.dev/ci/recipes/set-up/monorepo-ci-github-actions

But this breaks the pipeline, so we probably have to remove it...

Related to #83

.github/workflows/default.yml

@@ -33,7 +33,6 @@ jobs:
       - uses: nrwl/nx-set-shas@v3
         with:
           main-branch-name: 'master'
-      - run: git branch --track master origin/master
       - uses: pnpm/action-setup@v2
         with:
           version: 8