chore: release v1.8.1

Author: osteele

CHANGELOG.md

@@ -3,6 +3,8 @@
 
 ## Unreleased
 
+## 1.8.1 (2026-02-27)
+
 ### Performance
 
 - **Template Rendering**: ~25% faster, ~54% less memory, ~27% fewer allocations in template rendering benchmarks.
@@ -13,16 +15,14 @@
   - Use stack-allocated array for filter arguments, avoiding heap allocation for filters with ≤4 args
   - Use `maps.Copy` with pre-sized maps for bindings copies
 
-### Changed
-
-- Replace custom `intMin`/`intMax` helpers with Go 1.21+ `min`/`max` builtins.
-
-## 1.8.1 (2026-02-27)
-
 ### Fixed
 
 - **String-to-Number Conversion in Arithmetic Filters**: Fixed regression where string values from bindings were not converted to numbers in `plus`, `minus`, `times`, and `divided_by` filters. For example, `{{ str_var | plus: 1 }}` where `str_var = "10"` now correctly returns `11` instead of `1`. This was introduced in v1.8.0 when filter signatures changed from `float64` to `any` (#124).
 
+### Changed
+
+- Replace custom `intMin`/`intMax` helpers with Go 1.21+ `min`/`max` builtins.
+
 ### Tests
 
 - Expanded test coverage across render, parser, values, filters, and engine packages.