fix path

Author: Jason2866

tools/install-esp-idf.sh

@@ -52,6 +52,7 @@ if [ "$IDF_TAG" ]; then
     git -C "$IDF_PATH" checkout "tags/$IDF_TAG"
     idf_was_installed="1"
 elif [ "$IDF_COMMIT" ]; then
+    cd $IDF_PATH
     git remote add cherrypick https://github.com/$IDF_REPO.git
     git fetch cherrypick release/v5.3
     echo "Checkout commit $IDF_COMMIT from branch $IDF_BRANCH"