update swift version to 6.1.1

Signed-off-by: Srijan Saurav <[email protected]>

Author: srijan-deepsource

Dockerfile

@@ -1,4 +1,4 @@
-FROM swift:5.8.1-jammy as swift-format-builder
+FROM swift:6.1.1-jammy as swift-format-builder
 ADD . /toolbox
 WORKDIR /toolbox
 RUN swift build -c release --static-swift-stdlib