fixed typos (#761)

In the introduction section, "Is the architecture of the entire DB-GPT
shown" should be "The architecture of the entire DB-GPT is shown."

In the "Contact Information" section, you might want to rephrase "if you
have any ideas about building the community" to "if you have any ideas
for building the community" for better clarity.

README.md

@@ -177,7 +177,7 @@ Currently, we have released multiple key features, which are listed below to dem
 | [StarRocks](https://github.com/StarRocks/starrocks)                             | No          |           TODO                              |
 
 ## Introduction 
-Is the architecture of the entire DB-GPT shown in the following figure:
+The architecture of the entire DB-GPT is shown.
 
 <p align="center">
   <img src="./assets/DB-GPT.png" width="800" />
@@ -330,7 +330,7 @@ As of October 10, 2023, by fine-tuning an open-source model of 13 billion parame
 The MIT License (MIT)
 
 ## Contact Information
-We are working on building a community, if you have any ideas about building the community, feel free to contact us.
+We are working on building a community, if you have any ideas for building the community, feel free to contact us.
 [![](https://dcbadge.vercel.app/api/server/nASQyBjvY?compact=true&style=flat)](https://discord.gg/nASQyBjvY)
 
 <p align="center">