[ci][docs] fix broken links (#3176)

* Update make.bat

* Update README.rst

* Update .linkcheckerrc

* Update GPU-Windows.rst

* Update GPU-Windows.rst

docs/.linkcheckerrc

@@ -6,6 +6,7 @@ sslverify=0
 [filtering]
 ignore=
   pythonapi/lightgbm\..*\.html.*
+  http://sphinx-doc.org
 ignorewarnings=http-robots-denied,https-certificate-error
 checkextern=1
 

docs/GPU-Windows.rst

@@ -581,9 +581,9 @@ And open an issue in GitHub `here`_ with that log.
 
 .. _Boost: https://www.boost.org/users/history/
 
-.. _Prebuilt Boost x86_64: https://archives.fedoraproject.org/pub/archive/fedora/linux/releases/29/Everything/x86_64/os/Packages/m/mingw64-boost-static-1.66.0-2.fc29.noarch.rpm
+.. _Prebuilt Boost x86_64: https://mirror.linux-ia64.org/fedora/linux/releases/32/Everything/x86_64/os/Packages/m/mingw64-boost-static-1.66.0-6.fc32.noarch.rpm
 
-.. _Prebuilt Boost i686: https://archives.fedoraproject.org/pub/archive/fedora/linux/releases/29/Everything/x86_64/os/Packages/m/mingw32-boost-static-1.66.0-2.fc29.noarch.rpm
+.. _Prebuilt Boost i686: https://mirror.linux-ia64.org/fedora/linux/releases/32/Everything/x86_64/os/Packages/m/mingw32-boost-static-1.66.0-6.fc32.noarch.rpm
 
 .. _7zip: https://www.7-zip.org/download.html
 

docs/README.rst

 Documentation
 =============
 
-Documentation for LightGBM is generated using `Sphinx <http://www.sphinx-doc.org/>`__
+Documentation for LightGBM is generated using `Sphinx <https://www.sphinx-doc.org/>`__
 and `Breathe <https://breathe.readthedocs.io/>`__, which works on top of `Doxygen <http://www.doxygen.nl/index.html>`__ output.
 
 List of parameters and their descriptions in `Parameters.rst <./Parameters.rst>`__

docs/make.bat

@@ -23,7 +23,7 @@ if errorlevel 9009 (
 	echo.may add the Sphinx directory to PATH.
 	echo.
 	echo.If you don't have Sphinx installed, grab it from
-	echo.http://sphinx-doc.org/
+	echo.https://www.sphinx-doc.org/
 	exit /b 1
 )