update go-sqlite3 to v0.18.0 (#3204)

vendor/github.com/ncruces/go-sqlite3/embed/README.md

@@ -1,6 +1,6 @@
 # Embeddable Wasm build of SQLite
 
-This folder includes an embeddable Wasm build of SQLite 3.46.0 for use with
+This folder includes an embeddable Wasm build of SQLite 3.46.1 for use with
 [`github.com/ncruces/go-sqlite3`](https://pkg.go.dev/github.com/ncruces/go-sqlite3).
 
 The following optional features are compiled in:
@@ -17,14 +17,24 @@ The following optional features are compiled in:
 - [regexp](https://github.com/sqlite/sqlite/blob/master/ext/misc/regexp.c)
 - [series](https://github.com/sqlite/sqlite/blob/master/ext/misc/series.c)
 - [uint](https://github.com/sqlite/sqlite/blob/master/ext/misc/uint.c)
-- [uuid](https://github.com/sqlite/sqlite/blob/master/ext/misc/uuid.c)
 - [time](../sqlite3/time.c)
 
-See the [configuration options](../sqlite3/sqlite_cfg.h),
+See the [configuration options](../sqlite3/sqlite_opt.h),
 and [patches](../sqlite3) applied.
 
 Built using [`wasi-sdk`](https://github.com/WebAssembly/wasi-sdk),
 and [`binaryen`](https://github.com/WebAssembly/binaryen).
 
 The build is easily reproducible, and verifiable, using
-[Artifact Attestations](https://github.com/ncruces/go-sqlite3/attestations).
+[Artifact Attestations](https://github.com/ncruces/go-sqlite3/attestations).
+
+### Customizing the build
+
+You can use your own custom build of SQLite.
+
+Examples of custom builds of SQLite are:
+- [`github.com/ncruces/go-sqlite3/embed/bcw2`](https://github.com/ncruces/go-sqlite3/tree/main/embed/bcw2)
+  built from a branch supporting [`BEGIN CONCURRENT`](https://sqlite.org/src/doc/begin-concurrent/doc/begin_concurrent.md)
+  and [Wal2](https://www.sqlite.org/cgi/src/doc/wal2/doc/wal2.md).
+- [`github.com/asg017/sqlite-vec-go-bindings/ncruces`](https://github.com/asg017/sqlite-vec-go-bindings)
+  which includes the [`sqlite-vec`](https://github.com/asg017/sqlite-vec) vector search extension.