Bump thanosio/thanos from v0.31.0 to v0.32.2 in /docker

Bumps thanosio/thanos from v0.31.0 to v0.32.2.

---
updated-dependencies:
- dependency-name: thanosio/thanos
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docker/Dockerfile

@@ -1,6 +1,6 @@
 FROM prom/prometheus:v2.46.0 AS prometheus
 
-FROM thanosio/thanos:v0.31.0 AS thanos
+FROM thanosio/thanos:v0.32.2 AS thanos
 
 ## Variant
 FROM philipssoftware/variant:v0.3.0 AS variant