[ESIMD] Fix more occurrences of 'experimental' namespace in the docs. (#6071)

Author: kbobrovs

sycl/doc/extensions/experimental/sycl_ext_intel_esimd/sycl_ext_intel_esimd.md

@@ -28,7 +28,7 @@ Explicit SIMD APIs can be used only in code to be executed on Intel graphics
 architecture devices and the host device for now. Attempt to run such code on
 other devices will result in error. 
 
-All the ESIMD APIs are defined in the `sycl::ext::intel::experimental::esimd`
+All the ESIMD APIs are defined in the `sycl::ext::intel::esimd`
 namespace.
 
 Kernels and `SYCL_EXTERNAL` functions using ESP must be explicitly marked with
@@ -104,7 +104,7 @@ device-side API
 - 2D and 3D accessors
 - Constant accessors
 - `sycl::accessor::get_pointer()`. All memory accesses through an accessor are
-done via explicit APIs; e.g. `sycl::ext::intel::experimental::esimd::block_store(acc, offset)`
+done via explicit APIs; e.g. `sycl::ext::intel::esimd::block_store(acc, offset)`
 - Accessors with offsets and/or access range specified
 - `sycl::sampler` and `sycl::stream` classes
 
@@ -122,7 +122,7 @@ The element type must either be a vectorizable type. or the `sycl::half` type.
 The set of vectorizable types is the
 set of fundamental SYCL arithmetic types excluding `bool`. The length of the
 vector is the second template parameter.
-See the complete [API reference](https://intel.github.io/llvm-docs/doxygen/classcl_1_1sycl_1_1ext_1_1intel_1_1experimental_1_1esimd_1_1simd.html) for the `simd` class for more details.
+See the complete [API reference](https://intel.github.io/llvm-docs/doxygen/classcl_1_1____ESIMD__NS_1_1simd.html#details) for the `simd` class for more details.
 
 ESIMD compiler back-end does the best it can to map each `simd` class object to a
 contiguous block of registers in the general register file (GRF).
@@ -418,7 +418,7 @@ See more details in the API documentation
 
 #### Extended math
 ESIMD supports what is known as "extended math" set of math operations,
-providing correponding API in the `sycl::ext::intel::experimental::esimd`
+providing correponding API in the `sycl::ext::intel::esimd`
 namespace. Those operations are mapped to efficient hardware instructions and
 thus have accuracy provided by hardware, which often does not match one required
 by the SYCL specification. The table below shows the supported extended math