docs(blogs): drop dead scws download links

Both URLs in the tip were dead. The GitHub one referenced an account that
does not exist, and the Gitea one is retired.

Point at the upstream SCWS project instead, and stop promising a
pre-built Windows binary — upstream publishes source only, and the 1.2.3
the dead link referenced was OnixByte's own build.

docs/en-gb/blogs/postgresql-zhparser-fuzzy-search.md

@@ -73,7 +73,7 @@ This step requires `pg_config` from the self-compiled PostgreSQL installation.
    make USE_PGXS=1 PG_CONFIG=/usr/local/pgsql/bin/pg_config install
    ```
 
-   *Note: The `install` step automatically places `zhparser.so` into PG's `pkglibdir` and extension scripts into the `extension` directory.*
+   _Note: The `install` step automatically places `zhparser.so` into PG's `pkglibdir` and extension scripts into the `extension` directory._
 
 ### Resolving Dynamic Library Dependencies
 
@@ -152,8 +152,15 @@ Leverage the structural parsing capabilities of **`companynameparser`** to strip
 
 ### Lexicon Compilation and Deployment
 
+<!-- TODO(link): this tip used to offer OnixByte's pre-compiled Windows build of
+scws. Both URLs were dead — the GitHub one referenced an account that does not
+exist, and the Gitea one is being retired. Pointing at upstream in the meantime;
+restore a download link here if one is published again. -->
+
 :::tip
-Users compiling `xdb` binary dictionary files on Windows can visit OnixByte’s [GitHub](https://github.com/onixbyte/scws/releases/tag/1.2.3) or [GitLab](https://git.onixbyte.cn/onixbyte/scws/-/releases/1.2.3) pages to download the native scws command-line tool for Windows, pre-compiled using MingW.
+The native scws command-line tool for Windows is compiled with MingW. Source and
+build instructions are available from the upstream
+[SCWS project](https://github.com/hightman/scws).
 :::
 
 Convert the text dictionary to SCWS's efficient binary format (XDB):
@@ -208,5 +215,6 @@ SELECT * FROM ts_debug('chinese', '元一能源');
 ```
 
 **Optimisation Notes:**
+
 - **Explicit Weight Compensation**: This is the key technique that resolved the "元一" tokenisation failure (shown as `x`).
 - **Distinguish Restart from Reload**: `shared_preload_libraries` must be activated via `restart`, not a simple reload.