Update common Prometheus files (#430)

Signed-off-by: prombot <prometheus-team@googlegroups.com>

Author: prombot

.github/dependabot.yml

@@ -20,6 +20,9 @@ updates:
       k8s.io:
         patterns:
           - "k8s.io/*"
+      prometheus:
+        patterns:
+          - "github.com/prometheus/*"
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:

Makefile.common

@@ -61,7 +61,7 @@ PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_
 SKIP_GOLANGCI_LINT :=
 GOLANGCI_LINT :=
 GOLANGCI_LINT_OPTS ?=
-GOLANGCI_LINT_VERSION ?= v2.11.4
+GOLANGCI_LINT_VERSION ?= v2.12.2
 GOLANGCI_FMT_OPTS ?=
 # golangci-lint only supports linux, darwin and windows platforms on i386/amd64/arm64.
 # windows isn't included here because of the path separator being different.