Doc dependencies (#24341)

* doc: fix sphinx dependencies

Fix dependencies to be set at Sphinx>=4.5 while keeping docutils
at 0.17.

Signed-off-by: Gaute Svanes Lunde <[email protected]>

* doc: renamed to README for inclusion in toc-tree

Renamed file to from Readme.md to README.md for inclusion in the
Sphinx ToC tree.

Signed-off-by: Gaute Svanes Lunde <[email protected]>

* doc: Fixed link path

Fixed a broken link path to
`docs/guides/silabs_efr32_software_update.md`.

Signed-off-by: Gaute Svanes Lunde <[email protected]>

Signed-off-by: Gaute Svanes Lunde <[email protected]>

Author: gautesl

docs/requirements.txt

@@ -1,4 +1,5 @@
-Sphinx
+docutils==0.17.1
+Sphinx>=4.5
 sphinx-book-theme
 myst-parser
-breathe
+breathe>=4.34

examples/contact-sensor-app/telink/Readme.md renamed to examples/contact-sensor-app/telink/README.md

@@ -361,7 +361,7 @@ tracking code inside the `trackAlloc` and `trackFree` function
 
 For the description of Software Update process with EFR32 example applications
 see
-[EFR32 OTA Software Update](../../../docs/guides/silabs_efr32_software_update.md)
+[EFR32 OTA Software Update](../../../../docs/guides/silabs_efr32_software_update.md)
 
 ## Building options