Build branch 1.0 on OpenSearch core tag 1.0.0 instead of branch 1.0 (#1426)

Author: cliu123

.github/workflows/cd.yml

@@ -31,7 +31,7 @@ jobs:
       with:
         repository: 'opensearch-project/OpenSearch'
         path: OpenSearch
-        ref: '1.0'
+        ref: '1.0.0'
 
     - name: Build OpenSearch
       working-directory: ./OpenSearch

.github/workflows/ci.yml

@@ -41,7 +41,7 @@ jobs:
       with:
         repository: 'opensearch-project/OpenSearch'
         path: OpenSearch
-        ref: '1.0'
+        ref: '1.0.0'
 
     - name: Build OpenSearch
       working-directory: ./OpenSearch