Bump follow-redirects from 1.15.4 to 1.15.9 in /examples/wasm/www #1080

Job	Run time
Windows (stable, default features)	1m 0s
Ubuntu (stable, no default features)	19s
Build benchmarks	33s
Ubuntu (stable, all features)	40s
Build documentation	15s
Compute binary sizes	35s
Ubuntu (stable, default features)	15s
Ubuntu (nightly, no default features)	20s
Build Wasm demo	45s
Fuzz test (fill_first_fit)	3m 16s
Ubuntu (nightly, all features)	24s
Fuzz test (fill_optimal_fit)	3m 5s
Ubuntu (nightly, default features)	15s
Fuzz test (fill_fast_path)	3m 6s
Fuzz test (wrap_first_fit)	3m 5s
Fuzz test (wrap_optimal_fit)	3m 7s
Fuzz test (wrap_optimal_fit_usize)	3m 0s
Fuzz test (wrap_fast_path)	3m 4s
Fuzz test (unfill)	2m 58s
Fuzz test (refill)	2m 59s
Minimum supported Rust version (no default features)	18s
Minimum supported Rust version (all features)	28s
Minimum supported Rust version (default features)	12s
Deploy Wasm demo	0s
	33m 59s

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