small metadata fix

etl/steps/data/garden/oecd/2023-05-19/co2_air_transport.meta.yml

@@ -57,7 +57,7 @@ tables:
         display:
           numDecimalPlaces: 0
       int_inb_out_per_capita:
-        title: Per capita CO₂ emissions from international flights, international tourism-adjusted
+        title: Per capita CO₂ emissions from international flights, international tourism-adjusted.
         source:  Clarke et al. (2022) via OECD (2023);  United Nations World Tourism Organization (UNWTO, 2023)
         description: >
           International aviation emissions are assigned to the country of departure. The term "per capita" indicates that the emissions are calculated on a per-person basis, taking into account the total population of the country. By using this measurement, we can understand the average amount of CO₂ emissions attributed to each individual as a result of domestic air travel.
@@ -73,6 +73,9 @@ tables:
 
 
           Note that when an individual visits/leaves a country multiple times within a year, each visit is counted as a separate trip.
+
+
+          CO₂ emissions from commercial passenger flights only.
         unit: kilograms
         short_unit: kg
         display:
@@ -96,7 +99,7 @@ tables:
         title: Monthly CO₂ emissions from international aviation
         unit: tonnes
         short_unit: t
-        description: International aviation emissions are assigned to the country of departure.  CO₂ emissions from commercial passenger flights only.
+        description: International aviation emissions are assigned to the country of departure. CO₂ emissions from commercial passenger flights only.
         display:
           numDecimalPlaces: 0
           zeroDay: '2019-01-01'