Auto merge of #54117 - Mark-Simulacrum:stable-next, r=Mark-Simulacrum

[stable] 1.29.0 stable release

r? @alexcrichton
diff --git a/src/ci/run.sh b/src/ci/run.sh
index d68e0eb..9be3199 100755
--- a/src/ci/run.sh
+++ b/src/ci/run.sh
@@ -51,7 +51,7 @@
 #
 # FIXME: need a scheme for changing this `nightly` value to `beta` and `stable`
 #        either automatically or manually.
-export RUST_RELEASE_CHANNEL=beta
+export RUST_RELEASE_CHANNEL=stable
 if [ "$DEPLOY$DEPLOY_ALT" != "" ]; then
   RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --release-channel=$RUST_RELEASE_CHANNEL"
   RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --enable-llvm-static-stdcpp"