[Release] Add release notes for Arrow Go 18.4.1 (#699)

Co-authored-by: Bryce Mecum <petridish@gmail.com>

Author: zeroshade

_posts/2025-09-04-arrow-go-18.4.1.md

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+---
+layout: post
+title: "Apache Arrow Go 18.4.1 Release"
+date: "2025-09-04 00:00:00"
+author: pmc
+categories: [release]
+---
+<!--
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+
+The Apache Arrow team is pleased to announce the v18.4.1 release of Apache Arrow Go. 
+This patch release covers 15 commits from 7 distinct contributors.
+
+## Contributors
+```console
+$ git shortlog -sn v18.4.0..v18.4.1
+     7	Matt Topol
+     4	Mandukhai Alimaa
+     1	Chromo-residuum-opec
+     1	Ryan Schneider
+     1	Travis Patterson
+     1	daniel-adam-tfs
+     1	secfree
+```
+
+## Highlights
+
+- The `Record` interface type has been renamed to `RecordBatch` to align with
+other Arrow implementations and to avoid confusion. The old `Record` type is
+aliased to the new `RecordBatch` type so existing code works but users may wish
+to update references now. This work was contributed by a first-time contributor,
+@Mandukhai-Alimaa. See [#466](https://github.com/apache/arrow-go/pull/466),
+[#473](https://github.com/apache/arrow-go/pull/473),
+[#478](https://github.com/apache/arrow-go/pull/478), and
+[#486](https://github.com/apache/arrow-go/pull/486).
+ 
+### Important Note
+
+- A side effect of the above was an unintentional breaking change by introducing a new
+  method to the `RecordReader` interface. This shouldn't affect the majority of consumers,
+  but is a breaking change for any who implemented their own concrete `RecordReader` type.
+  The solution is simply to add a `RecordBatch()` method to the type when upgrading to v18.4.1
+
+## Changelog
+
+### What's Changed
+* fix(arrow/compute/exprs): Handle large types in expr handling by @zeroshade in https://github.com/apache/arrow-go/pull/440
+* fix(arrow/compute/exprs): fix literalToDatum for precision types by @zeroshade in https://github.com/apache/arrow-go/pull/447
+* fix(arrow/array): Fix RecordFromJSON perf by @zeroshade in https://github.com/apache/arrow-go/pull/449
+* fix(arrow/array): update timestamp json format by @zeroshade in https://github.com/apache/arrow-go/pull/450
+* refactor: switch golang.org/x/exp to standard library packages by @ufUNnxagpM in https://github.com/apache/arrow-go/pull/453
+* fix(parquet/pqarrow): supress io.EOF in RecordReader.Err() by @ryanschneider in https://github.com/apache/arrow-go/pull/452
+* fix(array): add nil checks in Data.Release() for childData by @secfree in https://github.com/apache/arrow-go/pull/456
+* fix(arrow/compute): Fix scalar comparison batches by @zeroshade in https://github.com/apache/arrow-go/pull/465
+* refactor(arrow): rename Record to RecordBatch and add deprecated alias by @Mandukhai-Alimaa in https://github.com/apache/arrow-go/pull/466
+* refactor(arrow): migrate leaf packages to use RecordBatch by @Mandukhai-Alimaa in https://github.com/apache/arrow-go/pull/473
+* refactor(arrow): third increment of the Record -> RecordBatch migration by @Mandukhai-Alimaa in https://github.com/apache/arrow-go/pull/478
+* ci(parquet/pqarrow): integration tests for reading shredded variants by @zeroshade in https://github.com/apache/arrow-go/pull/455
+* Implement RLE dictionary decoder using generics by @daniel-adam-tfs in https://github.com/apache/arrow-go/pull/477
+* fix(parquet/internal/encoding): Fix typed dictionary encoding by @MasslessParticle in https://github.com/apache/arrow-go/pull/479
+* refactor(arrow): fourth increment of the Record -> RecordBatch migration by @Mandukhai-Alimaa in https://github.com/apache/arrow-go/pull/486
+* chore: bump version number by @zeroshade in https://github.com/apache/arrow-go/pull/487
+
+### New Contributors
+* @ufUNnxagpM made their first contribution in https://github.com/apache/arrow-go/pull/453
+* @ryanschneider made their first contribution in https://github.com/apache/arrow-go/pull/452
+* @secfree made their first contribution in https://github.com/apache/arrow-go/pull/456
+* @Mandukhai-Alimaa made their first contribution in https://github.com/apache/arrow-go/pull/466
+* @daniel-adam-tfs made their first contribution in https://github.com/apache/arrow-go/pull/477
+
+**Full Changelog**: https://github.com/apache/arrow-go/compare/v18.4.0...v18.4.1