fix: const qualifier in test_transport_ssh.c

build3/CMakeFiles/tests.dir/link.txt

@@ -0,0 +1 @@
+/nix/store/788mx070y81zjlg5ipcl0cra3afviw9k-gcc-wrapper-15.2.0/bin/gcc -O3 -DNDEBUG -Wl,--dependency-file=CMakeFiles/tests.dir/link.d CMakeFiles/tests.dir/tests/runner.c.o CMakeFiles/tests.dir/tests/test_array_list.c.o CMakeFiles/tests.dir/tests/test_chunk.c.o CMakeFiles/tests.dir/tests/test_compression.c.o CMakeFiles/tests.dir/tests/test_config.c.o CMakeFiles/tests.dir/tests/test_data.c.o CMakeFiles/tests.dir/tests/test_delta.c.o CMakeFiles/tests.dir/tests/test_file.c.o CMakeFiles/tests.dir/tests/test_glob.c.o CMakeFiles/tests.dir/tests/test_metadata.c.o CMakeFiles/tests.dir/tests/test_property.c.o CMakeFiles/tests.dir/tests/test_protocol.c.o CMakeFiles/tests.dir/tests/test_queue.c.o CMakeFiles/tests.dir/tests/test_robustness.c.o CMakeFiles/tests.dir/tests/test_scanner.c.o CMakeFiles/tests.dir/tests/test_shared_utils.c.o CMakeFiles/tests.dir/tests/test_stress.c.o CMakeFiles/tests.dir/src/shared/array_list.c.o CMakeFiles/tests.dir/src/shared/chunk.c.o CMakeFiles/tests.dir/src/shared/compression.c.o CMakeFiles/tests.dir/src/shared/config.c.o CMakeFiles/tests.dir/src/shared/data.c.o CMakeFiles/tests.dir/src/shared/delta.c.o CMakeFiles/tests.dir/src/shared/file.c.o CMakeFiles/tests.dir/src/shared/log.c.o CMakeFiles/tests.dir/src/shared/metadata.c.o CMakeFiles/tests.dir/src/shared/multiprocessing.c.o CMakeFiles/tests.dir/src/shared/protocol.c.o CMakeFiles/tests.dir/src/shared/queue.c.o CMakeFiles/tests.dir/src/shared/transport_ssh.c.o CMakeFiles/tests.dir/src/shared/transport_tcp.c.o CMakeFiles/tests.dir/src/shared/transport_tls.c.o CMakeFiles/tests.dir/src/shared/utils.c.o CMakeFiles/tests.dir/src/client/scanner.c.o -o tests  /nix/store/gd74vdpqzq0qmmikvmrf3r3kghhhnf50-zstd-1.5.7/lib/libzstd.so /nix/store/y18pnbvfarnilsmgayswvi1khaw9wbsc-openssl-3.6.2/lib/libssl.so /nix/store/y18pnbvfarnilsmgayswvi1khaw9wbsc-openssl-3.6.2/lib/libcrypto.so _deps/xxhash-build/libxxhash.a