[skip ci] Add quotes to string

Author: oesteban

fmriprep/data/paper_sample.yml

@@ -1,4 +1,4 @@
-ds000001: ["01", "02", "07", 08]
+ds000001: ["01", "02", "07", "08"]
 ds000002: ["02", "03", "04", "10"]
 ds000003: ["02", "09", "10", "11"]
 ds000005: ["01", "04", "05", "15"]
@@ -52,4 +52,4 @@ ds000229: ["02", "05", "07", "10"]
 ds000231: ["01", "02", "03", "09"]
 ds000233: [rid000001, rid000017, rid000031, rid000032]
 ds000237: ["01", "03", "04", "06"]
-ds000243: ["023", "066", "089", "094"]
+ds000243: ["023", "066", "089", "094"]