chore: fix R build on macOS in verification #209

Job	Run time
check (macOS, adbcsnowflake) / r-check	5m 42s
check (macOS, adbcdrivermanager) / r-check	3m 42s
check (macOS, adbcflightsql) / r-check	2m 59s
check (macOS, adbcpostgresql) / r-check	2m 44s
check (macOS, adbcsqlite) / r-check	5m 9s
check (ubuntu, adbcdrivermanager) / r-check	1m 46s
check (ubuntu, adbcflightsql) / r-check	3m 46s
check (ubuntu, adbcpostgresql) / r-check	2m 9s
check (ubuntu, adbcsnowflake) / r-check	2m 55s
check (ubuntu, adbcsqlite) / r-check	2m 30s
check (windows, adbcdrivermanager) / r-check	4m 31s
check (windows, adbcflightsql) / r-check	5m 6s
check (windows, adbcpostgresql) / r-check	5m 10s
check (windows, adbcsnowflake) / r-check	6m 50s
check (windows, adbcsqlite) / r-check	5m 22s
	1h 0m 21s

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