Use subshell to set IFS again

Signed-off-by: Arthit Suriyawongkul <arthit@gmail.com>

.github/workflows/publish_v3.yml

@@ -164,7 +164,6 @@ jobs:
         # Fallback for backward compatibility with old URLs before v3.0.1
         working-directory: spdx-spec
         run: |
-          ALL_VERSIONS=$(echo "$VERSION" "$VERSION_ALIASES")
           MAP_PATH="etc/model-redirect-map.csv"
           TEMPLATE_PATH="etc/model-redirect-template.html"
           INDEX_HTML="index.html"
@@ -174,13 +173,15 @@ jobs:
           git checkout $GH_PAGES_BRANCH
           IFS=$'\n'
           for line in $maps; do
-            echo "$line" | IFS=',' read -r from to
-            for alias in $ALL_VERSIONS; do
-              echo "Redirect: $alias/docs/model/$from -> $VERSION/docs/model/$to"
-              html=$(echo "$template" | sed -e "s/__VERSION__/$VERSION/g" -e "s/__THING__/$to/g")
-              mkdir -p "$alias/docs/model/$from"
-              echo "$html" > "$alias/docs/model/$from/$INDEX_HTML"
-              git add "$alias/docs/model/$from/$INDEX_HTML"
+            for alias in $VERSION $VERSION_ALIASES; do
+              (
+                echo "$line" | IFS=',' read -r from to
+                echo "Redirect: $alias/docs/model/$from -> $VERSION/docs/model/$to"
+                html=$(echo "$template" | sed -e "s/__VERSION__/$VERSION/g" -e "s/__THING__/$to/g")
+                mkdir -p "$alias/docs/model/$from"
+                echo "$html" > "$alias/docs/model/$from/$INDEX_HTML"
+                git add "$alias/docs/model/$from/$INDEX_HTML"
+              )
             done
           done
           git commit -m "Add model redirections for: $VERSION $VERSION_ALIASES"