github: Don't upload the msys2 artifacts along with the release

They weren't intended to be part of the artifacts as part of the
release; the artifacts were added just for testing purposes.

.github/workflows/build.yml

@@ -674,6 +674,7 @@ jobs:
       - name: Rearrange files
         run: |
           rm -rf linux-asserts*
+          rm -rf msys2*
           mv *-toolchain/*.zip *-toolchain/*.tar.xz .
       - name: Upload binaries
         env:

.github/workflows/release.yml

@@ -48,6 +48,7 @@ jobs:
       - name: Rearrange files
         run: |
           rm -rf linux-asserts*
+          rm -rf msys2*
           mv *-toolchain/*.zip *-toolchain/*.tar.xz .
       - name: Set environment
         run: |