docs: Fix ambiguity in saas access use case prereqs

[jamilbk]

Just a minor wording change.

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Performance Test Results

TCP

Test Name	Received/s	Sent/s	Retransmits
direct-tcp-client2server	243.0 MiB (-0%)	244.9 MiB (-0%)	289 (+60%)
direct-tcp-server2client	239.6 MiB (-2%)	241.0 MiB (-2%)	492 (-9%)
relayed-tcp-client2server	230.3 MiB (+1%)	231.2 MiB (+1%)	243 (+10%)
relayed-tcp-server2client	232.2 MiB (-2%)	232.8 MiB (-2%)	516 (+25%)

UDP

Test Name	Total/s	Jitter	Lost
direct-udp-client2server	50.0 MiB (-0%)	0.03ms (-12%)	0.00% (NaN%)
direct-udp-server2client	50.0 MiB (+0%)	0.01ms (-8%)	0.00% (NaN%)
relayed-udp-client2server	50.0 MiB (+0%)	0.05ms (-62%)	0.00% (NaN%)
relayed-udp-server2client	50.0 MiB (-0%)	0.01ms (-15%)	0.00% (NaN%)