Update GraphicsMagick to 1.3.33

Co-authored-by: Stan Hu <stanhu@gmail.com>
Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

changelogs/unreleased/update-graphicsmagick-to-1-3-33.yml

+---
+title: Update GraphicsMagick to 1.3.33
+merge_request: 3494
+author: Takuya Noguchi
+type: security

config/software/graphicsmagick.rb

@@ -15,7 +15,7 @@
 #
 name 'graphicsmagick'
-default_version '1.3.29'
+default_version '1.3.33'
 license 'MIT'
 license_file 'Copyright.txt'
@@ -25,8 +25,8 @@ skip_transitive_dependency_licensing true
 dependency 'libpng'
 dependency 'zlib'
-source url: "http://ftp.icm.edu.pl/pub/unix/graphics/GraphicsMagick/1.3/GraphicsMagick-#{version}.tar.gz",
-       sha256: 'de820cd10597205941a7e9d02c2e679231e92e8e769c204ef09034d2279ad453'
+source url: "https://ftp.icm.edu.pl/pub/unix/graphics/GraphicsMagick/1.3/GraphicsMagick-#{version}.tar.gz",
+       sha256: '00ea0df7c78c903cce325f402429bcd3924168cf39277f743a0641d47c411ee8'
 relative_path "GraphicsMagick-#{version}"