config(elevation): Add elevation canterbury_2020-2023_dem_1m to eleva…

…tion LI-1553 (#980)

### Motivation

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### Modifications

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### Verification

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config/tileset/elevation.json

@@ -444,6 +444,13 @@
       "minZoom": 9,
       "title": "West Coast LiDAR 1m DEM (2020-2022)",
       "name": "west-coast_2020-2022_dem_1m"
+    },
+    {
+      "2193": "s3://nz-elevation/canterbury/canterbury_2020-2023/dem_1m/2193/",
+      "3857": "s3://linz-basemaps/elevation/3857/canterbury_2020-2023_dem_1m/01J868QZZ4RJ485PMWP1ECQYD0/",
+      "minZoom": 9,
+      "title": "Canterbury LiDAR 1m DEM (2020-2023)",
+      "name": "canterbury_2020-2023_dem_1m"
     }
   ],
   "outputs": [