Fix script urls in `README.md` #7402

Job	Run time
build / build (windows-2022, /c/ProgramData/OpenTelemetry .NET AutoInstrumentation/logs)	10m 48s
build / build (ubuntu-20.04, /var/log/opentelemetry/dotnet)	6m 8s
build / build (macos-11, /var/log/opentelemetry/dotnet)	8m 26s
build-container / build-container (alpine, linux-musl)	5m 59s
build-container / build-container (centos, linux-glibc)	8m 36s
test-build-container (alpine, alpine, linux-musl)	16m 40s
test-build-container (centos, centos, linux-glibc)	17m 56s
test-build-container (debian, centos, linux-glibc)	13m 35s
test-build-windows-container-tests (windows-2022, windows-only)	18m 56s
test-build-native (windows-2022)	6m 45s
test-build-managed (net7.0, windows-2022)	18m 20s
test-build-managed (net7.0, ubuntu-20.04)	13m 46s
test-build-managed (net7.0, macos-11)	14m 40s
test-build-managed (net6.0, windows-2022)	17m 48s
test-build-managed (net6.0, ubuntu-20.04)	11m 2s
test-build-managed (net6.0, macos-11)	13m 26s
test-build-managed (net462, windows-2022)	15m 55s
build-nuget-packages / build-nuget-packages	6m 7s
test-nuget-packages (ubuntu-20.04)	2m 58s
test-nuget-packages (macos-11)	5m 42s
test-nuget-packages (windows-2022)	5m 39s
	3h 59m 12s

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