fix: exam submit email content #1856

Job	Run time
Tests (ubuntu-latest, 3.11, 20, django42-drflatest)	1m 5s
Tests (ubuntu-latest, 3.11, 20, quality)	1m 7s
Tests (ubuntu-latest, 3.11, 20, pii_check)	32s
Tests (ubuntu-latest, 3.11, 20, version_check)	27s
Tests (ubuntu-latest, 3.11, 20, js_tests)	53s
Tests (ubuntu-latest, 3.11, 20, js_lint)	52s
Tests (ubuntu-latest, 3.11, 20, rst_validation)	32s
Tests (ubuntu-latest, 3.11, 20, translations-django42)	1m 7s
Tests (ubuntu-latest, 3.12, 20, django42-drflatest)	1m 27s
Tests (ubuntu-latest, 3.12, 20, quality)	1m 19s
Tests (ubuntu-latest, 3.12, 20, pii_check)	41s
Tests (ubuntu-latest, 3.12, 20, version_check)	37s
Tests (ubuntu-latest, 3.12, 20, js_tests)	59s
Tests (ubuntu-latest, 3.12, 20, js_lint)	1m 2s
Tests (ubuntu-latest, 3.12, 20, rst_validation)	45s
Tests (ubuntu-latest, 3.12, 20, translations-django42)	1m 25s
	14m 50s

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