release: bump 0.8.4 -> 0.8.5 (#258)

Version bump `0.8.4` → `0.8.5`.

### Fixed
- The R binding's golden-fixture parity test now skips gracefully when the shared `testdata/golden` fixtures are not bundled with the package — standalone r-universe / CRAN builds package only `bindings/r`, so the repo-root fixtures are unreachable there (this was failing the r-universe build of 0.8.4). The parity stays enforced by the repository CI, where the fixtures are present. (#257)

Bump touches the manual release touchpoints only (`Cargo.toml`/`Cargo.lock`, Python/Node/Java/C#/R manifests, lockfiles, `SECURITY.md`, `CHANGELOG.md`). docs/webpage version strings are left to `sync-about.yml` on the tag.

bindings/csharp/Wickra/Wickra.csproj

@@ -11,7 +11,7 @@
 
     <!-- NuGet package metadata -->
     <PackageId>Wickra</PackageId>
-    <Version>0.8.4</Version>
+    <Version>0.8.5</Version>
     <Authors>kingchenc</Authors>
     <Description>High-performance streaming technical-analysis indicators (514 indicators) for .NET, backed by the native Rust core via the Wickra C ABI.</Description>
     <PackageLicenseExpression>MIT OR Apache-2.0</PackageLicenseExpression>