update list of technology type

sdrf-proteomics/README.adoc

@@ -255,7 +255,11 @@ Technology type is used in SDRF and MAGE-TAB formats to specify the technology a
 
 NOTE: While we RECOMMEND positioning the technology type column after the assay name, in some original templates, this column was placed before the assay name. We will allow the technology type column to appear either directly before or after the assay name column but RECOMMEND placing it after the assay name for consistency. 
 
-For proteomics experiments the possible values for technology types can be obtained from PRIDE Ontology term https://www.ebi.ac.uk/ols4/ontologies/pride/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FPRIDE_0000663[technology type]. 
+For proteomics experiments the possible values for technology types can be obtained from PRIDE Ontology term https://www.ebi.ac.uk/ols4/ontologies/pride/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FPRIDE_0000663[technology type].
+
+Here, the list of valid values: 
+
+- proteomic profiling by mass spectrometer
 
 [[additional-data-files]]
 === Additional Data files technical properties