package/gnuplot: bump version to 5.4.6

Signed-off-by: Michael Fischer <mf@go-sys.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gnuplot/gnuplot.hash

@@ -1,6 +1,6 @@
-# From https://sourceforge.net/projects/gnuplot/files/gnuplot/5.4.5/
-md5  c10cf81faa69d77e255a1dcfc625ba78  gnuplot-5.4.5.tar.gz
-sha1  1179a768fd5f585a5dcb6aedea76cfa7a8dd5dfe  gnuplot-5.4.5.tar.gz
+# From https://sourceforge.net/projects/gnuplot/files/gnuplot/5.4.6/
+md5  da719235bb2f46830f9d2101d04b14a5  gnuplot-5.4.6.tar.gz
+sha1  31ea0c00af5c156e5d068e3b1cc2fb1847f471ab  gnuplot-5.4.6.tar.gz
 # Locally computed
-sha256  66f679115dd30559e110498fc94d926949d4d370b4999a042e724b8e910ee478  gnuplot-5.4.5.tar.gz
+sha256  02fc27918200ed64d8f0c3b84fe81b95b59cd47ad99f270939ae497c19f27419  gnuplot-5.4.6.tar.gz
 sha256  895928ec0735cca1c8cec42656c7e314a065d0242813bb8693c0c1bf61fd4e4d  Copyright

package/gnuplot/gnuplot.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-GNUPLOT_VERSION = 5.4.5
+GNUPLOT_VERSION = 5.4.6
 GNUPLOT_SITE = http://downloads.sourceforge.net/project/gnuplot/gnuplot/$(GNUPLOT_VERSION)
 GNUPLOT_LICENSE = gnuplot license (open source)
 GNUPLOT_LICENSE_FILES = Copyright