bump golangci-lint to 2.6.0 (#221)

Author: bluenviron-bot

.github/workflows/lint.yml

@@ -19,7 +19,7 @@ jobs:
 
     - uses: golangci/golangci-lint-action@v8
       with:
-        version: v2.5.0
+        version: v2.6.0
 
   go_mod:
     runs-on: ubuntu-22.04

Makefile

@@ -1,5 +1,5 @@
 BASE_IMAGE = golang:1.25-alpine3.22
-LINT_IMAGE = golangci/golangci-lint:v2.5.0
+LINT_IMAGE = golangci/golangci-lint:v2.6.0
 
 .PHONY: $(shell ls)