Bump third_party/libwebsockets/repo from `26c3f9a` to `288f36f` #67426

Job	Run time
REPL Tests - Linux	32m 20s
REPL Tests - Linux	32m 20s
Test Suites - Darwin (no-ble-asan-clang)	1h 40m 34s
Test Suites - Darwin (no-ble-asan-clang)	1h 40m 34s
Test Suites - Darwin (no-ble-tsan-clang)	2h 4m 13s
Test Suites - Darwin (no-ble-tsan-clang)	2h 4m 13s
Test Suites - Linux (no-ble-tsan-clang)	49m 22s
Test Suites - Linux (no-ble-tsan-clang)	2h 12m 56s
REPL Tests - Darwin	0s
REPL Tests - Darwin	0s
	11h 36m 32s

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