software/caucase: fix json schema

what we usually call float is called number in json schema
https://spacetelescope.github.io/understanding-json-schema/reference/numeric.html#number

software/caucase/instance-caucase-input-schema.json

@@ -50,13 +50,13 @@
     "crl-life-period": {
       "title": "CRL life time period",
       "description": "Number of individual certificate validity periods during which the CRL is valid. Default: 1/50.0",
-      "type": "float",
+      "type": "number",
       "default": 0.2
     },
     "ca-life-period": {
       "title": "CA Certificate life period",
       "description": "Number of individual certificate validity periods during which the CA certificate is valid. Default: 10",
-      "type": "float",
+      "type": "number",
       "default": 10
     },
     "crt-keep-time": {