Bump httpx from 0.28.0 to 0.28.1 (#72)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
 # Package
 ciso8601==2.1.3
-httpx==0.28.0
+httpx==0.28.1
 zeep[async]==4.3.1