.github/workflows: update golangci-lint for Go 1.22

Updates #11058

Change-Id: I3785c1f1bea4a4663e7e5fb6d209d3caedae436d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

.github/workflows/golangci-lint.yml

@@ -34,7 +34,7 @@ jobs:
         # Note: this is the 'v3' tag as of 2023-08-14
         uses: golangci/golangci-lint-action@639cd343e1d3b897ff35927a75193d57cfcba299
         with:
-          version: v1.54.2
+          version: v1.56
 
           # Show only new issues if it's a pull request.
           only-new-issues: true