Replace broken links

[sjvrijn]

Checklist before requesting a review

• I have read the contribution guidelines
• My code follows the style guidelines of this project
• I have performed a self-review of my code
• [ ] I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] All user facing changes have been added to CHANGELOG.md

Type of change

• Bug fix (non-breaking change which fixes an issue)

List of related issues or pull requests**

Refs:

• guide.esciencecenter.nl links have changed #686

Describe the changes made in this pull request

Wherever possible, old links to the guide have been replaced by updated working ones.
Those links for which the content is no longer on the guide, I've replaced them with links to the Turing Way instead.
Only for the NOTICE file was even this not possible, so I linked to the documentation on apache.org instead. Not quite happy with this one though, so better suggestions are more than welcome!

Instructions to review the pull request

Install the requirements

cd $(mktemp -d --tmpdir py-tmpl-XXXXXX)
pip install pipx
pipx install copier

Create a new package using the template

copier copy --vcs-ref <YOUR_BRANCH> https://github.com/nlesc/python-template test_package

Create a local git repo to push to GitHub to trigger CI actions

git init
git add --all
git commit -m "First commit"
git remote add origin git@github.com:<YOU>/python-template-test.git
git push -u origin main -f

[bouweandela]

Thanks!