gha: update modernise import URL

Ref: https://go.dev/cl/706918
Ref: https://go.dev/cl/730820
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>

Author: cyphar

.github/workflows/ci.yml

@@ -60,7 +60,7 @@ jobs:
           git diff --exit-code
       - name: gopls modernise
         run: |
-          go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix -test ./...
+          go run golang.org/x/tools/go/analysis/passes/modernize/cmd/modernize@latest -fix -test ./...
           git diff --exit-code
       - run: |
           make local-validate