fix(ci): format build and test command for better readability (#763)

.github/workflows/ci.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 582cccd..bba2534 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -78,5 +78,8 @@
           version: "21.7"
 
       - name: Build and Test On JDK 8
-        run: mvn -B -e clean test -Pjdk8 -pl !geaflow/geaflow-plugins/geaflow-store/geaflow-store-vector
-        -Duser.timezone=Asia/Shanghai -Dlog4j.configuration="log4j .rootLogger=WARN, stdout"
+        run: |
+          mvn -B -e clean test -Pjdk8 \
+            -pl !geaflow/geaflow-plugins/geaflow-store/geaflow-store-vector \
+            -Duser.timezone=Asia/Shanghai \
+            -Dlog4j.configuration="log4j .rootLogger=WARN, stdout"

geaflow-ai/src/main/java/org/apache/geaflow/ai/GeaFlowMemoryServer.java

diff --git a/geaflow-ai/src/main/java/org/apache/geaflow/ai/GeaFlowMemoryServer.java b/geaflow-ai/src/main/java/org/apache/geaflow/ai/GeaFlowMemoryServer.java
index bfcf0dd..5121ae7 100644
--- a/geaflow-ai/src/main/java/org/apache/geaflow/ai/GeaFlowMemoryServer.java
+++ b/geaflow-ai/src/main/java/org/apache/geaflow/ai/GeaFlowMemoryServer.java
@@ -121,7 +121,7 @@
         } else if (schema instanceof EdgeSchema) {
             memoryMutableGraph.addEdgeSchema((EdgeSchema) schema);
         } else {
-            throw new RuntimeException("Cannt add schema: " + input);
+            throw new RuntimeException("Cannot add schema: " + input);
         }
         return "addSchema has been called, schemaName: " + schemaName;
     }