Read correct field in QEC scheme

[msoeken]

The wrong field is read to calculate the physical number of qubits for a QEC scheme.

[github-actions]

Benchmark for 4ae961f

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Test	Base	PR	%
Array append evaluation	336.6±2.96µs	331.9±1.49µs	-1.40%
Array literal evaluation	173.8±5.93µs	188.8±0.92µs	+8.63%
Array update evaluation	409.0±1.16µs	410.3±4.00µs	+0.32%
Core + Standard library compilation	18.5±0.12ms	18.5±0.09ms	0.00%
Deutsch-Jozsa evaluation	5.0±0.05ms	5.1±0.08ms	+2.00%
Large file parity evaluation	34.1±0.08ms	34.2±0.07ms	+0.29%
Large input file compilation	12.1±0.14ms	12.1±0.14ms	0.00%
Large input file compilation (interpreter)	45.0±0.58ms	45.1±0.51ms	+0.22%
Large nested iteration	32.8±0.25ms	32.6±0.21ms	-0.61%
Perform Runtime Capabilities Analysis (RCA) on Deutsch-Jozsa sample	1555.4±32.73µs	1553.6±29.45µs	-0.12%
Perform Runtime Capabilities Analysis (RCA) on large file sample	7.6±0.09ms	7.7±0.07ms	+1.32%
Perform Runtime Capabilities Analysis (RCA) on teleport sample	1413.7±30.84µs	1414.0±29.01µs	+0.02%
Perform Runtime Capabilities Analysis (RCA) on the core and std libraries	27.7±0.12ms	27.7±0.15ms	0.00%
Teleport evaluation	88.8±3.64µs	90.6±8.68µs	+2.03%

[swernli]

Are there any test updates that should come with this?

[msoeken]

Are there any test updates that should come with this?

No test needed to be updated.