[hotfix][release] Build 0.2 docs in GitHub Action (#493)

Author: GreatEugenius

.github/workflows/docs.yml

@@ -31,6 +31,7 @@ jobs:
       matrix:
         branch:
           - main
+          - release-0.2
           - release-0.1
 
     steps:
@@ -45,7 +46,7 @@ jobs:
           echo "flink_branch=${currentBranch}" >> ${GITHUB_ENV}
           
           if [ "${currentBranch}" = "main" ]; then
-            echo "flink_alias=release-0.2" >> ${GITHUB_ENV}
+            echo "flink_alias=release-0.3" >> ${GITHUB_ENV}
           elif [ "${currentBranch}" = "release-0.1" ]; then
             echo "flink_alias=latest" >> ${GITHUB_ENV}
           fi