[docs] title case and fixes in en/concepts/

[blinkov]

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[github-actions]

🟢 2025-04-03 05:32:50 UTC The validation of the Pull Request description is successful.

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✅ Documentation build

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✅ Documentation build

Revision built successfully
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[github-actions]

⚪ 2025-04-03 05:37:45 UTC Pre-commit check linux-x86_64-relwithdebinfo for d9262cb has started.
⚪ 2025-04-03 05:38:00 UTC Artifacts will be uploaded here
⚪ 2025-04-03 05:40:18 UTC ya make is running...
🟢 2025-04-03 05:40:23 UTC Tests successful.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
0	0	0	0	0	0

🟢 2025-04-03 05:40:29 UTC Build successful.

[github-actions]

⚪ 2025-04-03 05:38:01 UTC Pre-commit check linux-x86_64-release-asan for d9262cb has started.
⚪ 2025-04-03 05:38:16 UTC Artifacts will be uploaded here
⚪ 2025-04-03 05:40:28 UTC ya make is running...
🟢 2025-04-03 05:40:33 UTC Tests successful.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
0	0	0	0	0	0

🟢 2025-04-03 05:40:39 UTC Build successful.

[github-actions]

✅ Documentation build

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⚪ 2025-04-14 02:13:03 UTC Pre-commit check linux-x86_64-relwithdebinfo for b757e33 has started.
⚪ 2025-04-14 02:13:09 UTC Artifacts will be uploaded here
⚪ 2025-04-14 02:15:30 UTC ya make is running...
🟢 2025-04-14 02:15:36 UTC Tests successful.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
0	0	0	0	0	0

🟢 2025-04-14 02:15:41 UTC Build successful.

[github-actions]

⚪ 2025-04-14 02:13:33 UTC Pre-commit check linux-x86_64-release-asan for b757e33 has started.
⚪ 2025-04-14 02:13:40 UTC Artifacts will be uploaded here
⚪ 2025-04-14 02:15:55 UTC ya make is running...
🟢 2025-04-14 02:16:00 UTC Tests successful.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
0	0	0	0	0	0

🟢 2025-04-14 02:16:06 UTC Build successful.

[github-actions]

✅ Documentation build

Revision built successfully
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[github-actions]

⚪ 2025-04-16 02:12:26 UTC Pre-commit check linux-x86_64-relwithdebinfo for ee6121c has started.
⚪ 2025-04-16 02:12:32 UTC Artifacts will be uploaded here
⚪ 2025-04-16 02:14:46 UTC ya make is running...
🟢 2025-04-16 02:14:51 UTC Tests successful.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
0	0	0	0	0	0

🟢 2025-04-16 02:14:57 UTC Build successful.

[github-actions]

⚪ 2025-04-16 02:16:04 UTC Pre-commit check linux-x86_64-release-asan for ee6121c has started.
⚪ 2025-04-16 02:16:12 UTC Artifacts will be uploaded here
⚪ 2025-04-16 02:18:43 UTC ya make is running...
🟢 2025-04-16 02:18:51 UTC Tests successful.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
0	0	0	0	0	0

🟢 2025-04-16 02:18:58 UTC Build successful.

lgtm