fixup! amend! [llvm-readelf] Update outdated URL

Author: wenzhoumei

llvm/include/llvm/BinaryFormat/ELF.h

@@ -131,7 +131,7 @@ enum { EV_NONE = 0, EV_CURRENT = 1 };
 // At the time of writing, the list of registered machine architectures is
 // at https://groups.google.com/g/generic-abi/c/0kORSDcyhTE/m/ZRf_PvcHAAAJ
 // Please refer to https://groups.google.com/g/generic-abi for any further
-// updates
+// updates.
 enum {
   EM_NONE = 0,           // No machine
   EM_M32 = 1,            // AT&T WE 32100