Fix defs reference (required by latest jsonschema-py)

'#$defs/version' is not a valid anchor, neither as a plain name anchor nor as a JSON Pointer. You may have intended to use '#/$defs/version', as the slash is required *before each segment* of a JSON pointer.

camtrap-dp-profile.json

@@ -57,7 +57,7 @@
                     "description": "URL of the used Camtrap DP Table Schema version (e.g. `https://raw.githubusercontent.com/tdwg/camtrap-dp/1.0/deployments-table-schema.json`).",
                     "allOf": [
                       {
-                        "$ref": "#$defs/version"
+                        "$ref": "#/$defs/version"
                       },
                       {
                         "type": "string",