[mips] Update the link to the MIPS documentation in CompilerWriterInfo.rst.

llvm-svn: 276850

Author: dsandersllvm

llvm/docs/CompilerWriterInfo.rst

@@ -34,7 +34,7 @@ Itanium (ia64)
 MIPS
 ----
 
-* `MIPS Processor Architecture <http://imgtec.com/mips/mips-architectures.asp>`_
+* `MIPS Processor Architecture <https://imgtec.com/mips/architectures/>`_
 
 * `MIPS 64-bit ELF Object File Specification <http://techpubs.sgi.com/library/manuals/4000/007-4658-001/pdf/007-4658-001.pdf>`_