[clang-tidy] Compile fix: Change CPlusPlus2a to CPlusPlus20.

[mboehme]

Summary

The name of the option was changed here:

https://github.com/llvm/llvm-project/commit/6a30894391ca671bab16c505eff30c7819bd8e8e

[mboehme]

Already fixed in

https://github.com/llvm/llvm-project/commit/fd2740143e626ca32432aac0b51b2880a3b1e0bc

Retracting this.

clang-tools-extra/clang-tidy/readability/UseAnyOfAllOfCheck.cpp

static bool isViableLoop(const CXXForRangeStmt &S, ASTContext &Context) {
   return llvm::none_of(Matches, [&Mutations](auto &DeclRef) {
     // TODO: allow modifications of loop-local variables
     return Mutations.isMutated(
         DeclRef.template getNodeAs<DeclRefExpr>("decl_ref")->getDecl());
   });
 }
 
 void UseAnyOfAllOfCheck::check(const MatchFinder::MatchResult &Result) {
-  StringRef Ranges = getLangOpts().CPlusPlus2a ? "::ranges" : "";
+  StringRef Ranges = getLangOpts().CPlusPlus20 ? "::ranges" : "";
 
   if (const auto *S = Result.Nodes.getNodeAs<CXXForRangeStmt>("any_of_loop")) {
     if (!isViableLoop(*S, *Result.Context))
       return;
 
     diag(S->getForLoc(), "replace loop by 'std%0::any_of()'") << Ranges;
   } else if (const auto *S =
                  Result.Nodes.getNodeAs<CXXForRangeStmt>("all_of_loop")) {