Wrong Markdown path

Description / Example

Fixed Markdown link in the hint:

[2019-03-19T15:39:51+0300] Markdown reports saved at:
[2019-03-19T15:39:51+0300] './artifacts/test_ru/md_reports/1_2019_03_19T14_50_18_+0300/K001.md'
[2019-03-19T15:39:51+0300] './artifacts/test_ru/md_reports/1_2019_03_19T14_50_18_+0300/K002.md'
[2019-03-19T15:39:51+0300] './artifacts/test_ru/md_reports/1_2019_03_19T14_50_18_+0300/K003.md'
[2019-03-19T15:39:51+0300]
[2019-03-19T15:39:51+0300] === Run on 'db12': ./resources/checks/L001_table_sizes.sh ===
[2019-03-19T15:39:51+0300] === End of running ===
[2019-03-19T15:39:52+0300] JSON report saved at: './artifacts/test_ru/json_reports/1_2019_03_19T14_50_18_+0300/L001_table_sizes.json'
[2019-03-19T15:39:52+0300] Markdown report saved at: './artifacts/test_ru/md_reports/1_2019_03_19T14_50_18_+0300/L001.md'

...

[vyagofarov@mac:~/git/check] $ ls ./artifacts/test_ru/md_reports/1_2019_03_19T14_50_18_+0300/L001.md
./artifacts/test_ru/md_reports/1_2019_03_19T14_50_18_+0300/L001.md
[vyagofarov@mac:~/git/check] $

[vyagofarov@mac:~/git/check] $ ls ./artifacts/test_ru/md_reports/1_2019_03_19T14_50_18_+0300/K003.md
./artifacts/test_ru/md_reports/1_2019_03_19T14_50_18_+0300/K003.md
[vyagofarov@mac:~/git/check] $

Closes #347 (closed)