Fix invalid entries in CITATION.cff

Author: claudiodsf

CITATION.cff

@@ -7,8 +7,8 @@ authors:
 title: "SourceSpec – Earthquake source parameters from P- or S-wave displacement spectra"
 doi: 10.5281/ZENODO.3688587
 url: "https://sourcespec.seismicsource.org"
-repository-code:: "https://github.com/SeismicSource/sourcespec"
-license: "CeCILL 2.1"
+repository-code: "https://github.com/SeismicSource/sourcespec"
+license: "CECILL-2.1"
 identifiers:
   - description: "This is the collection of archived snapshots of all versions of SourceSpec"
     type: doi