fix: make releases smaller (#1234)

* Update release_prep.sh

Fixes a copy-paste mistake, somehow between testing this and making the PR I used the wrong flag. Was distracted in the Vancouver office!

```

echo -n "e2e export-ignore\nexamples export-ignore" > .git/info/attributes
cat .git/info/attributes
e2e export-ignore\nexamples export-ignore

echo -e "e2e export-ignore\nexamples export-ignore" > .git/info/attributes
cat .git/info/attributes
e2e export-ignore
examples export-ignore

```

* Update release_prep.sh

Don't use a \n character, it's just confusing. Readability is more important here.

Author: alexeagle

.github/workflows/release_prep.sh

@@ -9,7 +9,8 @@ TAG=${GITHUB_REF_NAME}
 PREFIX="rules_js-${TAG:1}"
 ARCHIVE="rules_js-$TAG.tar.gz"
 # Don't include e2e or examples in the distribution artifact, to reduce size
-echo -n "e2e export-ignore\nexamples export-ignore" > .git/info/attributes
+echo >>.git/info/attributes "e2e export-ignore"
+echo >>.git/info/attributes "examples export-ignore" 
 git archive --format=tar --prefix="${PREFIX}/" "${TAG}" | gzip > "$ARCHIVE"
 SHA=$(shasum -a 256 "$ARCHIVE" | awk '{print $1}')