chore: use new @memset api

[travisstaloch]

No description provided.

[20kano]

install transitive failure
└─ install zls transitive failure
   └─ zig build-exe zls Debug native 1 errors
      └─ options success
src/analyser/InternPool.zig:3336:5: error: expected 3 arguments, found 2
    @memset(&str1, 0);

> zig version
0.11.0-dev.2839+d0311e28b

[sagehane]

I think the issue seems to be that this change requires the minimum supported Zig version to be bumped?