use /v3 for the url

Author: rdeioris

docs/rpc/openapi.yaml

@@ -929,7 +929,7 @@ paths:
               example:
                 $ref: ./api/core-node/get-health-error.example.json
 
-  /v2/contracts/fast-call-read/{contract_address}/{contract_name}/{function_name}:
+  /v3/contracts/fast-call-read/{contract_address}/{contract_name}/{function_name}:
     post:
       summary: Call read-only function in fast mode (no cost tracking)
       tags:

stackslib/src/net/api/fastcallreadonly.rs

@@ -81,14 +81,14 @@ impl HttpRequest for RPCFastCallReadOnlyRequestHandler {
 
     fn path_regex(&self) -> Regex {
         Regex::new(&format!(
-            "^/v2/contracts/fast-call-read/(?P<address>{})/(?P<contract>{})/(?P<function>{})$",
+            "^/v3/contracts/fast-call-read/(?P<address>{})/(?P<contract>{})/(?P<function>{})$",
             *STANDARD_PRINCIPAL_REGEX_STRING, *CONTRACT_NAME_REGEX_STRING, *CLARITY_NAME_REGEX
         ))
         .unwrap()
     }
 
     fn metrics_identifier(&self) -> &str {
-        "/v2/contracts/fast-call-read/:principal/:contract_name/:func_name"
+        "/v3/contracts/fast-call-read/:principal/:contract_name/:func_name"
     }
 
     /// Try to decode this request.
@@ -340,7 +340,7 @@ impl StacksHttpRequest {
             host,
             "POST".into(),
             format!(
-                "/v2/contracts/fast-call-read/{}/{}/{}",
+                "/v3/contracts/fast-call-read/{}/{}/{}",
                 &contract_addr, &contract_name, &function_name
             ),
             HttpRequestContents::new().for_tip(tip_req).payload_json(