fix: Update source files pattern in codspeed cc_library target #91

Job	Run time
tests	15s
cmake-integration-tests (instrumentation, ubuntu-latest)	1m 16s
bazel-integration-tests (instrumentation, ubuntu-latest)	1m 21s
cmake-integration-tests (walltime, codspeed-macro)	1m 56s
bazel-integration-tests (walltime, codspeed-macro)	1m 2s
bazel-integration-tests (off, ubuntu-latest)	14s
cmake-integration-tests (off, ubuntu-latest)	49s
	6m 53s

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