correct colab urls in person-works

Author: smierz

person-works/README.md

@@ -3,7 +3,7 @@
 A collection of Jupyter notebooks showing examples of using a persistent identifier for a person (here ORCID URL or iD) as input for different APIs of PID providers or PID Graphs and retrieving all works identified by a DOI connected to it.
 
 Currently available PID Graphs:
-* [Crossref](https://www.crossref.org/) [![Google Colab](https://badgen.net/badge/Launch/on%20Google%20Colab/blue?icon=terminal)](https://colab.research.google.com/github/Project-TAPIR/pidgraph-notebooks/blob/master/person-works/crossref_get_works_by_person.ipynb)
-* [FREYA PID Graph](https://blog.datacite.org/powering-the-pid-graph/) [![Google Colab](https://badgen.net/badge/Launch/on%20Google%20Colab/blue?icon=terminal)](https://colab.research.google.com/github/Project-TAPIR/pidgraph-notebooks/blob/master/person-works/freya_get_works_by_person.ipynb)
-* [OpenAlex](https://openalex.org/about)[![Google Colab](https://badgen.net/badge/Launch/on%20Google%20Colab/blue?icon=terminal)](https://colab.research.google.com/github/Project-TAPIR/pidgraph-notebooks/blob/master/person-works/openalex_get_works_by_person.ipynb)
-* [ORCID](https://orcid.org/)[![Google Colab](https://badgen.net/badge/Launch/on%20Google%20Colab/blue?icon=terminal)](https://colab.research.google.com/github/Project-TAPIR/pidgraph-notebooks/blob/master/person-works/orcid_get_works_by_person.ipynb)
+* [Crossref](https://www.crossref.org/) [![Google Colab](https://badgen.net/badge/Launch/on%20Google%20Colab/blue?icon=terminal)](https://colab.research.google.com/github/Project-TAPIR/pidgraph-notebooks/blob/main/person-works/crossref_get_works_by_person.ipynb)
+* [FREYA PID Graph](https://blog.datacite.org/powering-the-pid-graph/) [![Google Colab](https://badgen.net/badge/Launch/on%20Google%20Colab/blue?icon=terminal)](https://colab.research.google.com/github/Project-TAPIR/pidgraph-notebooks/blob/main/person-works/freya_get_works_by_person.ipynb)
+* [OpenAlex](https://openalex.org/about)[![Google Colab](https://badgen.net/badge/Launch/on%20Google%20Colab/blue?icon=terminal)](https://colab.research.google.com/github/Project-TAPIR/pidgraph-notebooks/blob/main/person-works/openalex_get_works_by_person.ipynb)
+* [ORCID](https://orcid.org/)[![Google Colab](https://badgen.net/badge/Launch/on%20Google%20Colab/blue?icon=terminal)](https://colab.research.google.com/github/Project-TAPIR/pidgraph-notebooks/blob/main/person-works/orcid_get_works_by_person.ipynb)