[LyX/master] Add plt as gnuplot extension (#11148)

[Juergen Spitzmueller]

commit f2e6a9b4aed4125284712ff041b6443e0ba01c57
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Tue Aug 6 16:29:55 2024 +0200

    Add plt as gnuplot extension (#11148)
    
    This seems to be the common one on Windows
---
 lib/configure.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/configure.py b/lib/configure.py
index c18ccf405f..d6540ca312 100644
--- a/lib/configure.py
+++ b/lib/configure.py
@@ -1270,7 +1270,7 @@ def checkConverterEntries():
             path = ['', inkscape_path])
     #
     checkProg('Gnuplot', ['gnuplot'],
-        rc_entry = [ r'''\Format gnuplot     "gp, gnuplot"    "Gnuplot"     "" "" ""  "vector"	"text/plain"
+        rc_entry = [ r'''\Format gnuplot     "gp, gnuplot, plt"    "Gnuplot"     "" "" ""  "vector"	"text/plain"
 \converter gnuplot      pdf6      "$${python} $$s/scripts/gnuplot2pdf.py $$i $$o"    "needauth"''' ])
     #
     # gnumeric/xls/ods to tex