Change RPC to lower case (#62)

Author: lausannel

PUBLISH.md

@@ -13,11 +13,11 @@ Note that this name should be unique, otherwise it will be rejected. You can sea
 
 Besides, you also need to modify the configuration in `./src/Apache.IoTDB/Apache.IoTDB.csproj` to ensure that the project references are correct.
 ``` xml
-<ProjectReference Include="..\Apache.IoTDB.RPC.Generated\Apache.IoTDB.RPC.Generated.csproj" />
+<ProjectReference Include="..\Apache.IoTDB.Rpc.Generated\Apache.IoTDB.Rpc.Generated.csproj" />
 ```
 to
 ``` xml
-<ProjectReference Include="..\PACKAGE_NAME.RPC.Generated\PACKAGE_NAME.RPC.Generated.csproj" />
+<ProjectReference Include="..\PACKAGE_NAME.Rpc.Generated\PACKAGE_NAME.Rpc.Generated.csproj" />
 ```
 
 ### Step 2: Add package information

src/Apache.IoTDB/Apache.IoTDB.csproj

@@ -9,7 +9,7 @@
     </ItemGroup>
 
     <ItemGroup>
-      <ProjectReference Include="..\Apache.IoTDB.RPC.Generated\Apache.IoTDB.RPC.Generated.csproj" />
+      <ProjectReference Include="..\Apache.IoTDB.Rpc.Generated\Apache.IoTDB.Rpc.Generated.csproj" />
     </ItemGroup>
 
 </Project>