Suggest pulumi install in error message instead of yarn install (#16150)

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# Description

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Seems like we should now recommend this instead, right?

Fixes # (issue)

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sdk/nodejs/cmd/pulumi-language-nodejs/main.go

@@ -582,7 +582,7 @@ func (host *nodeLanguageHost) Run(ctx context.Context, req *pulumirpc.RunRequest
 	runPath, err = locateModule(ctx, runPath, programDirectory, nodeBin)
 	if err != nil {
 		cmdutil.ExitError(
-			"It looks like the Pulumi SDK has not been installed. Have you run npm install or yarn install?")
+			"It looks like the Pulumi SDK has not been installed. Have you run pulumi install?")
 	}
 
 	// Channel producing the final response we want to issue to our caller. Will get the result of