Update installing-istio.md #8334

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3 errors and 1 warning

redir.fetchRepos calls github.RepositoriesService.ListByOrg, which eventually calls nistec.P256Point.ScalarBaseMult

redir.fetchRepos calls github.RepositoriesService.ListByOrg, which eventually calls nistec.P256Point.ScalarMult

redir.init calls github.init, which eventually calls nistec.P256Point.SetBytes

Restore cache failed: Dependencies file is not found in /home/runner/work/docs/docs. Supported file pattern: go.sum