Update Alpine image version to 3.22 released yesterday

DL6ER · DL6ER · commit 01b2edbc3d90 · 2025-05-31T13:03:04.000+02:00
Signed-off-by: DL6ER &lt;dl6er@dl6er.de&gt;
diff --git a/ftl-build/Dockerfile b/ftl-build/Dockerfile
@@ -1,4 +1,4 @@
-ARG CONTAINER="alpine:3.21"
+ARG CONTAINER="alpine:3.22"
 FROM ${CONTAINER} AS builder
 
 ARG TARGETPLATFORM
