Merge pull request #1384 from NachiaVivias/fix_missing_forum_link

[convolution_F_2_64] Fix missing forum link

Author: maspypy

convolution/convolution_F_2_64/info.toml

@@ -1,5 +1,6 @@
 title = 'Convolution ($\mathbb{F}_{2^{64}}$)'
 timelimit = 10.0
+forum = "https://github.com/yosupo06/library-checker-problems/issues/1367"
 
 [[tests]]
     name = "example.in"