Update master-refs.bib

Author: jugne

master-refs.bib

@@ -157,7 +157,7 @@ @ARTICLE{Heath2014
 
 @Manual{R2022,
     title = {R: A Language and Environment for Statistical Computing},
-    author = {{R Core Team}},
+    author = {R Core Team},
     organization = {R Foundation for Statistical Computing},
     address = {Vienna, Austria},
     year = {2022},