gitignore: /var/log — real-hardware log pulls stay out of the tree

(An earlier append landed on a line missing its newline, mangling
'.github/' and silently un-ignoring var/ — which let a stray add sweep
pulled logs into the tree. Repaired, and the logs untracked again.)

.gitignore

@@ -6,4 +6,5 @@ zig-out/
 .idea/
 
 .claude/
-.github//var/
+.github/
+/var/log/