[MINOR][DOCS] Fix one typo

### What changes were proposed in this pull request?
Fix one typo

### Why are the changes needed?
for doc

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

### How was this patch tested?
I didn't find other similar typos in this page, so only one fix

### Was this patch authored or co-authored using generative AI tooling?
no

Closes apache#43401 from zhengruifeng/minor_typo_connect_overview.

Authored-by: Ruifeng Zheng <ruifengz@apache.org>
Signed-off-by: Sean Owen <srowen@gmail.com>

docs/spark-connect-overview.md

@@ -261,7 +261,7 @@ spark-connect-repl --host myhost.com --port 443 --token ABCDEFG
 
 The supported list of CLI arguments may be found [here](https://github.com/apache/spark/blob/master/connector/connect/client/jvm/src/main/scala/org/apache/spark/sql/connect/client/SparkConnectClientParser.scala#L48).
 
-#### Configure programmatically with a connection ctring
+#### Configure programmatically with a connection string
 
 The connection may also be programmatically created using _SparkSession#builder_ as in this example:
 {% highlight scala %}