Bug fix: Update benchmarks/Python/json.py

[paudsu01]

No description provided.

[paudsu01]

The _read_array method in the _Parser class should raise an exception if the ending char at the end isn't "]".
Currently, it creates an exception object, but it doesn't throw the exception. This PR fixes that.

[smarr]

@paudsu01 thank you for the PR, this indeed looks like a bug porting the benchmark.
Did you by any chance check the other languages? I had a quick look at JavaScript and Java, there this already seems to throw correctly.

Thanks!

[paudsu01]

Hi, I just checked the other languages as well. Except for Python, I believe all of them throw the exception.

---

The smalltalk/SOM/SOMns JSON benchmarks have the following code:

are-we-fast-yet/benchmarks/Smalltalk/Json/JsonParser.som

Lines 98 to 100 in 1577332

	(self readChar: ']') ifFalse: [
	self expected: '"," or "]"'
	].

Not familiar with code syntax or semantics, but this self expected : msg is the same pattern I see in other places where an exception is(should be) raised as well in the code. So, I am assuming this will throw the exception.

[smarr]

@paudsu01 thanks a lot. I also had a look, and indeed, it was the only place where the raise/throw or similar was missing.

I pushed some CI updates to make one of the languages pass.

Will merge!