Fix release name for 2.0.29-lto (#885)

Fixes #884

emscripten-releases-tags.json

diff --git a/emscripten-releases-tags.json b/emscripten-releases-tags.json
index 486452c..e6716d7 100644
--- a/emscripten-releases-tags.json
+++ b/emscripten-releases-tags.json
@@ -9,7 +9,7 @@
     "latest-releases-upstream": "latest"
   },
   "releases": {
-    "2.0.20-lto": "439b7bd7da11e99065c84a60766e427b03be4206",
+    "2.0.29-lto": "439b7bd7da11e99065c84a60766e427b03be4206",
     "2.0.29": "c2369dc425725fff86ba90a9007a4603ddf7941b",
     "2.0.28-lto": "ac6ac36f7a02cec857bc1e543e55c686c5bd1256",
     "2.0.28": "866055ea639d64dfedc625d28ec981e47ce37168",