[SYCL] Fix links in ReleaseNotes (#7174)

Paths should be relative to the current file, not to the repo root.

Author: AlexeySachkov

sycl/ReleaseNotes.md

@@ -48,22 +48,22 @@ Release notes for commit range [`4043dda3..0f579bae`](https://github.com/intel/l
 ### Documentation
 
 - Added stateful to stateless memory access conversion
-  [design document](sycl/doc/design/ESIMDStatelesAccessors.md). [3e03f300]
-- Added [`sycl_ext_oneapi_complex`](sycl/doc/extensions/proposed/sycl_ext_oneapi_complex.asciidoc)
+  [design document](doc/design/ESIMDStatelesAccessors.md). [3e03f300]
+- Added [`sycl_ext_oneapi_complex`](doc/extensions/proposed/sycl_ext_oneapi_complex.asciidoc)
   extension proposal. [01589da5]
-- Updated [`sycl_ext_intel_fpga_device_selector`](sycl/doc/extensions/supported/sycl_ext_intel_fpga_device_selector.asciidoc)
+- Updated [`sycl_ext_intel_fpga_device_selector`](doc/extensions/supported/sycl_ext_intel_fpga_device_selector.asciidoc)
   extension to add `fpga_simulator_accessor`. [9bef890d]
-- Added [`sycl_ext_intel_fpga_kernel_interface_properties`](sycl/doc/extension/proposed/sycl_ext_intel_fpga_kernel_interface_properties.asciidoc) extension proposal. [4b6bd14b]
-- Updated [`sycl_ext_oneapi_complex_algorithms`](sycl/doc/extensions/proposed/sycl_ext_oneapi_complex_algorithms.asciidoc)
+- Added [`sycl_ext_intel_fpga_kernel_interface_properties`](doc/extension/proposed/sycl_ext_intel_fpga_kernel_interface_properties.asciidoc) extension proposal. [4b6bd14b]
+- Updated [`sycl_ext_oneapi_complex_algorithms`](doc/extensions/proposed/sycl_ext_oneapi_complex_algorithms.asciidoc)
   extension to include `sycl::complex` as supported type for algorithms. [07c5b48f]
-- Clarified sub-group size calculation in [`sycl_ext_oneapi_invoke_simd`](sycl/doc/extensions/experimental/sycl_ext_oneapi_invoke_simd.asciidoc) extension spec. [9b33ad0f]
-- Updated [`sycl_ext_oneapi_accessor_properties`](sycl/doc/extensions/supported/sycl_ext_oneapi_accessor_properties.asciidoc)
+- Clarified sub-group size calculation in [`sycl_ext_oneapi_invoke_simd`](doc/extensions/experimental/sycl_ext_oneapi_invoke_simd.asciidoc) extension spec. [9b33ad0f]
+- Updated [`sycl_ext_oneapi_accessor_properties`](doc/extensions/supported/sycl_ext_oneapi_accessor_properties.asciidoc)
   to mark `has_property` API as `noexcept`. [7805aa3f]
-- Updated [`sycl_ext_intel_device_info`](sycl/doc/extensions/supported/sycl_ext_intel_device_info.md)
+- Updated [`sycl_ext_intel_device_info`](doc/extensions/supported/sycl_ext_intel_device_info.md)
   to support querying free device memory. [0eeef2b3]
-- Updated [`sycl_ext_oneapi_matrix`](sycl/doc/extensions/experimental/sycl_ext_oneapi_matrix.asciidoc)
+- Updated [`sycl_ext_oneapi_matrix`](doc/extensions/experimental/sycl_ext_oneapi_matrix.asciidoc)
   with description of new matrix features. [770f540d]
-- Moved [`sycl_ext_oneapi_invoke_simd`](sycl/doc/extensions/experimental/sycl_ext_oneapi_invoke_simd.asciidoc)
+- Moved [`sycl_ext_oneapi_invoke_simd`](doc/extensions/experimental/sycl_ext_oneapi_invoke_simd.asciidoc)
   extensions specification from `proposed` to `experimental` because
   implementation is available. [6bee3440]