proxy: v2.326.0 (#14668)

Release notes: https://github.com/linkerd/linkerd2-proxy/releases/tag/release/v2.326.0

Signed-off-by: l5d-bot <[email protected]>
Co-authored-by: l5d-bot <[email protected]>
Co-authored-by: Scott Fleener <[email protected]>

Author: l5d-bot

.proxy-version

@@ -1 +1 @@
-v2.325.0
+v2.326.0