restore single quotes for urls in citation file

Author: dennisvang

CITATION.cff

@@ -9,30 +9,30 @@ authors:
     family-names: Bonino da Silva Santos
     email: l.o.boninodasilvasantos@utwente.nl
     affiliation: University of Twente (UT)
-    orcid: https://orcid.org/0000-0002-1164-1351
+    orcid: 'https://orcid.org/0000-0002-1164-1351'
   - given-names: Kees
     family-names: Burger
     affiliation: Leiden University Medical Center (LUMC)
   - given-names: Rajaram
     family-names: Kaliyaperumal
     affiliation: Leiden University Medical Center (LUMC)
-    orcid: https://orcid.org/0000-0002-1215-167X
+    orcid: 'https://orcid.org/0000-0002-1215-167X'
   - given-names: Marek
     family-names: Suchánek
     affiliation: Czech Technical University in Prague (CTU)
-    orcid: https://orcid.org/0000-0001-7525-9218
+    orcid: 'https://orcid.org/0000-0001-7525-9218'
   - given-names: Jan
     family-names: Slifka
-    orcid: https://orcid.org/0000-0002-4941-0575
+    orcid: 'https://orcid.org/0000-0002-4941-0575'
     affiliation: Czech Technical University in Prague (CTU)
   - given-names: Dennis
     family-names: van Gerwen
     affiliation: Leiden University Medical Center (LUMC)
-    orcid: https://orcid.org/0000-0002-7360-8303
+    orcid: 'https://orcid.org/0000-0002-7360-8303'
   - given-names: Mark
     family-names: Wilkinson
     affiliation: Universidad Politécnica de Madrid (UPM)
-    orcid: https://orcid.org/0000-0001-6960-357X
+    orcid: 'https://orcid.org/0000-0001-6960-357X'
 identifiers:
   - type: doi
     value: 10.5281/zenodo.17119592