fix typo in issimple filtering in Logging (#38425)

Author: KristofferC

base/logging.jl

@@ -282,7 +282,7 @@ function issimple(@nospecialize val)
     val isa Number && return true
     val isa Char && return true
     if val isa Expr
-        val.head === :quote && issimple(val[1]) && return true
+        val.head === :quote && issimple(val.args[1]) && return true
         val.head === :inert && return true
     end
     return false

test/corelogging.jl

@@ -409,4 +409,8 @@ end
     @test record.group == :corelogging  # name of this file
 end
 
+@testset "complicated kwargs logging macro" begin
+    @test_logs (:warn, "foo")  @warn "foo" argvals=:((DoNotCare{$(Expr(:escape, :Any))}(),))
+end
+
 end