Add WEAVIATE_138 version.

Author: jfrancoa

.github/workflows/main.yaml

@@ -29,6 +29,7 @@ env:
   WEAVIATE_135: 1.35.18
   WEAVIATE_136: 1.36.12
   WEAVIATE_137: 1.37.1-4e61e26.amd64
+  WEAVIATE_138: 1.38.0-rc.0
 
 jobs:
   lint-and-format:
@@ -320,7 +321,8 @@ jobs:
           $WEAVIATE_134,
           $WEAVIATE_135,
           $WEAVIATE_136,
-          $WEAVIATE_137
+          $WEAVIATE_137,
+          $WEAVIATE_138
         ]
     steps:
       - name: Checkout