Change golangci-yaml config file name

Lets standardize on .golangci.yml, not .golangci.yaml. This sort of
reverts part of a4c0feb.

Signed-off-by: Manuel Mendez <[email protected]>

Author: mmlb

lint-install.go

@@ -322,7 +322,7 @@ func main() {
 			cfg.LintCommands = append(cfg.LintCommands, goLintCmd(root, cfg.Go, false))
 			cfg.FixCommands = append(cfg.FixCommands, goLintCmd(root, cfg.Go, true))
 
-			diff, err := updateFile(root, ".golangci.yaml", goLintConfig, *dryRunFlag)
+			diff, err := updateFile(root, ".golangci.yml", goLintConfig, *dryRunFlag)
 			if err != nil {
 				klog.Exitf("update go lint config failed: %v", err)
 			}