[LLVM] Update TableGen maintainer (llvm#119569)

Update the maintainer for TableGen to jurahul, who has been driving
most of the recent development in this area.

Author: nikic

llvm/Maintainers.md

@@ -340,8 +340,8 @@ [email protected] (email), [slackito](https://github.com/slackito) (GitHub)
 
 #### TableGen
 
-Paul C. Anagnostopoulos \
-paul@windfall.com (email)
+Rahul Joshi \
+rjoshi@nvidia.com (email), [jurahul](https://github.com/jurahul) (GitHub)
 
 #### TextAPI
 
@@ -452,6 +452,7 @@ [email protected] (email), [lattner](https://github.com/lattner) (GitHub), clattn
 
 ### Inactive or former component maintainers
 
+Paul C. Anagnostopoulos ([email protected], [Paul-C-Anagnostopoulos](https://github.com/Paul-C-Anagnostopoulos)) -- TableGen \
 Justin Bogner ([email protected], [bogner](https://github.com/bogner)) -- SelectionDAG \
 Evan Cheng ([email protected]) -- Parts of code generator not covered by someone else \
 Renato Golin ([email protected], [rengolin](https://github.com/rengolin)) -- ARM backend \