[MINOR][DOCS] use the same Spark version in the readme and quick-start

### What changes were proposed in this pull request?

use the same Spark version in the readme and quick-start

### Why are the changes needed?

### Does this PR introduce _any_ user-facing change?

No

### How was this patch tested?

Closes #38 from haoxins/patch-1.

Authored-by: Xin Hao <haoxinst@gmail.com>
Signed-off-by: Martin Grund <martin.grund@databricks.com>

README.md

@@ -30,12 +30,12 @@ make gen && make test
 
 Step 4: Setup the Spark Driver on localhost.
 
-1. [Download Spark distribution](https://spark.apache.org/downloads.html) (3.4.0+), unzip the package.
+1. [Download Spark distribution](https://spark.apache.org/downloads.html) (3.5.0+), unzip the package.
 
 2. Start the Spark Connect server with the following command (make sure to use a package version that matches your Spark distribution):
 
 ```
-sbin/start-connect-server.sh --packages org.apache.spark:spark-connect_2.12:3.4.0
+sbin/start-connect-server.sh --packages org.apache.spark:spark-connect_2.12:3.5.0
 ```
 
 Step 5: Run the example Go application.
@@ -57,4 +57,4 @@ structure of the packages follows roughly the PySpark giudance but with Go idiom
 ## Contributing
 
 Please review the [Contribution to Spark guide](https://spark.apache.org/contributing.html)
-for information on how to get started contributing to the project.
+for information on how to get started contributing to the project.