Update clause_specification_text.adoc

Author: chris-little

standard/clause_specification_text.adoc

@@ -282,8 +282,8 @@ where `"SST_mean"` references the following parameter:
     "label" : {
       "en": "Sea surface temperature daily mean"
     },
-"statisticalMeasure": "https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Glossary:Arithmetic_mean",
-"narrower": ["http://vocab.nerc.ac.uk/standard_name/sea_surface_temperature/"]
+    "statisticalMeasure": "https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Glossary:Arithmetic_mean",
+    "narrower": ["http://vocab.nerc.ac.uk/standard_name/sea_surface_temperature/"]
   },
   "unit" : {
     "label": {
@@ -307,8 +307,8 @@ and `"SST_stddev"` references the following parameter:
     "label" : {
       "en": "Sea surface temperature standard deviation of daily mean"
     },
-"statisticalMeasure": "https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Glossary:Standard_deviation",
-"narrower": ["http://vocab.nerc.ac.uk/standard_name/sea_surface_temperature/"]
+    "statisticalMeasure": "https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Glossary:Standard_deviation",
+    "narrower": ["http://vocab.nerc.ac.uk/standard_name/sea_surface_temperature/"]
   },
   "unit" : {
     "label": {