[utilities/kate] doc/kate: Fix lsp debug var docs

Git commit a2dd6f00bc8e2ee3c5b4c7e2551a649a257c25e2 by Waqar Ahmed.
Committed on 12/02/2025 at 11:05.
Pushed by waqar into branch 'master'.

Fix lsp debug var docs

BUG: 499710

M  +1    -1    doc/kate/plugins.docbook

https://invent.kde.org/utilities/kate/-/commit/a2dd6f00bc8e2ee3c5b4c7e2551a649a257c25e2

diff --git a/doc/kate/plugins.docbook b/doc/kate/plugins.docbook
index c7e956159e..d673beab72 100644
--- a/doc/kate/plugins.docbook
+++ b/doc/kate/plugins.docbook
@@ -2930,7 +2930,7 @@ It may also be informative to examine the protocol exchange between &kate;'s
 LSP client and the LSP server.  Again, the latter usually has ways to trace
 that.  The LSP client also provides additional debug tracing (to stderr)
 when &kate; is invoked with the following
-<literal>QT_LOGGING_RULES=katelspclientplugin=true</literal> suitably
+<literal>LSPCLIENT_DEBUG=1</literal> suitably
 <literal>export</literal>'ed.
 </para>