Fix spi_worker mention in bgworker documentation

The documentation mentioned contrib/ but the module was moved to
src/test/modules/ by commit 22dfd116a127a of 9.5 era.

Problem pointed out by Dickson Guedes in bug #13896
Backpatch-to: 9.5.

diff --git a/doc/src/sgml/bgworker.sgml b/doc/src/sgml/bgworker.sgml
index 33ff5269516ad498be8a409a87fe25c1c51843e3..d024a1796e0596fb7f9289390ec1448e99cd64bb 100644 (file)
--- a/doc/src/sgml/bgworker.sgml
+++ b/doc/src/sgml/bgworker.sgml
@@ -232,7 +232,8 @@ typedef struct BackgroundWorker
   </para>
 
   <para>
-   The <filename>worker_spi</> contrib module contains a working example,
+   The <filename>src/test/modules/worker_spi</> module
+   contains a working example,
    which demonstrates some useful techniques.
   </para>