build/ci: bump Bazel to 4.2.2

Update to newest Bazel 4.2 patch release because newer rules_go versions
require it.

Change-Id: I3a54d8402c3e5f2183331cabaecac2cc6313e46a
Reviewed-on: https://review.monogon.dev/c/monogon/+/642
Reviewed-by: Leopold Schabel <leo@nexantic.com>
diff --git a/build/ci/Dockerfile b/build/ci/Dockerfile
index 4272dd6..81101de 100644
--- a/build/ci/Dockerfile
+++ b/build/ci/Dockerfile
@@ -48,8 +48,8 @@
 
 # Install Bazel binary
 RUN curl -o /usr/local/bin/bazel \
-	https://releases.bazel.build/4.2.0/release/bazel-4.2.0-linux-x86_64 && \
-	echo '643f3cdc707fc27dad3e5eb4f97ed7fa8f2a132a5477fb4ac2eae3c52d7abb65  /usr/local/bin/bazel' | sha256sum --check && \
+	https://releases.bazel.build/4.2.2/release/bazel-4.2.2-linux-x86_64 && \
+	echo '11dea6c7cfd866ed520af19a6bb1d952f3e9f4ee60ffe84e63c0825d95cb5859  /usr/local/bin/bazel' | sha256sum --check && \
 	chmod +x /usr/local/bin/bazel
 
 # Use a shared Go module cache for gazelle