debian: fix dbgsrc path #391

Job	Run time
lint	2m 8s
sanitizer - arm32v7/debian:trixie	2m 15s
sanitizer - debian:trixie	1m 27s
coverage - measure	1m 29s
macosx	2m 8s
msys2 - mingw32	3m 35s
ios	2m 9s
linux - arm64v8/debian:bookworm	1m 59s
msvs	5m 34s
linux - debian:bookworm	1m 27s
msys2 - mingw64	4m 3s
linux - ubuntu:noble	1m 18s
linux - arm32v7/debian:bookworm	2m 3s
sanitizer - arm64v8/debian:trixie	2m 3s
vcpkg - windows	2m 37s
android	4m 55s
conan - macos-latest	2m 38s
linux - arm32v7/debian:trixie	2m 24s
linux - arm64v8/debian:trixie	1m 56s
vcpkg - linux \|	1m 41s
conan - linux \|	1m 42s
conan - emscripten \|	1m 52s
linux - debian:trixie	1m 27s
	54m 50s

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