fix: clippy approx_constant lint and standardise release runner

Author: Derek

.github/workflows/release.yml

@@ -33,7 +33,7 @@ env:
 
 jobs:
   release:
-    runs-on: buildjet-32vcpu-ubuntu-2204
+    runs-on: ${{ vars.GH_RUNNER_DEFAULT || 'ubuntu-latest' }}
     steps:
       - uses: actions/checkout@v4
         with:

src/transport/vector_compat/convert.rs

@@ -160,9 +160,9 @@ mod tests {
     #[test]
     fn convert_float_value() {
         let v = event::Value {
-            kind: Some(event::value::Kind::Float(3.14)),
+            kind: Some(event::value::Kind::Float(2.718)),
         };
-        assert_eq!(vector_value_to_json(&v), serde_json::json!(3.14));
+        assert_eq!(vector_value_to_json(&v), serde_json::json!(2.718));
     }
 
     #[test]