fix: use a fixed version for prometheus-http-query dependency

This fixes the issue of the crate failing to compile

Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 
 [dependencies]
 enum-as-inner = "0.6.0"
-prometheus-http-query = "0.8.1"
+prometheus-http-query = "=0.8.2"
 reqwest = "0.11.22"
 url = "2.5.0"
 serde = { version = "1.0.193", optional = true }