ci: fix docs redirect url

.github/workflows/docs.yml

@@ -23,7 +23,7 @@ jobs:
           make build.docs
           # we need an index.html page (cargo doc doesn't create it)
           # this will just redirect to target/doc/imt/index.html
-          echo '<meta http-equiv="refresh" content="0;url=imt/index.html">' > target/doc/index.html
+          echo '<meta http-equiv="refresh" content="0;url=zk_kit_imt/index.html">' > target/doc/index.html
       - uses: actions/upload-pages-artifact@v3
         with:
           path: target/doc