docs(docs): add redirect for LeetCode 205 Isomorphic Strings)

apps/docs/redirects.ts

@@ -43,6 +43,7 @@ export default [
   { from: "/198", to: "/1d-dynamic-programming/house-robber" },
   { from: "/199", to: "/tree-bfs/binary-tree-right-side-view" },
   { from: "/200", to: "/graph-dfs/number-of-islands" },
+  { from: "/205", to: "/hash-table/isomorphic-strings" },
   { from: "/206", to: "/linked-list/reverse-linked-list" },
   { from: "/207", to: "/topological-sort/course-schedule" },
   { from: "/208", to: "/trie/implement-trie-prefix-tree" },