Update llvm from 20.1.5 to 20.1.6 (emscripten-forge#2355)

* Update llvm from 20.1.5 to 20.1.6

* Updating build number to 0

---------

Co-authored-by: emscripten-forge-bot <[email protected]>
Co-authored-by: Anutosh Bhat <[email protected]>

Author: emscripten-forge-bot

recipes/recipes_emscripten/llvm/recipe.yaml

@@ -1,5 +1,5 @@
 context:
-  version: 20.1.5
+  version: 20.1.6
 
 package:
   name: llvm
@@ -8,13 +8,13 @@ package:
 source:
   url: https://github.com/llvm/llvm-project/archive/refs/tags/llvmorg-${{ version
     }}.tar.gz
-  sha256: 205c436f93a7e185cf9d63ae57e645f23561a4d1bf854f2c5bd78995a43a5c05
+  sha256: afa487c401613f5e4a35935b2abfb5d07e6ebfa20df32787e34a5c7e97c6ea4b
   patches:
   - patches/shift_temporary_files_to_tmp_dir.patch
   - patches/enable_exception_handling.patch
 
 build:
-  number: 1
+  number: 0
 
 requirements:
   build:
@@ -23,7 +23,7 @@ requirements:
   - cmake
   - make    # [unix]
   - llvm-tblgen
-  
+
 tests:
 - package_contents:
     files: