chore: correct the regexp for extracting quantity to unbreak integration tests.

It started to extract quantity from numbers that don't followed by a special words.

Author: php-coder

src/main/java/ru/mystamps/web/feature/series/importing/SeriesInfoExtractorServiceImpl.java

@@ -61,7 +61,7 @@ public class SeriesInfoExtractorServiceImpl implements SeriesInfoExtractorServic
 	// Regular expression matches number of the stamps in a series (from 1 to 999).
 	// CheckStyle: ignore LineLength for next 2 lines
 	private static final Pattern NUMBER_OF_STAMPS_REGEXP = Pattern.compile(
-		"(?<quantity>[1-9][0-9]{0,2})(-?(ти|ой|ух))?( ((без)?зубцов(ая|ы[ех])))?(м\\*{0,2}|( (мар(ок|к[аи])|блок(а|ов)?|БЛ)?))",
+		"(?<quantity>[1-9][0-9]{0,2})(-?(ти|ой|ух))?( ((без)?зубцов(ая|ы[ех])))?(м\\*{0,2}| (мар(ок|к[аи])|блок(а|ов)?|БЛ))",
 		Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE
 	);
 

src/test/groovy/ru/mystamps/web/feature/series/importing/SeriesInfoExtractorServiceImplTest.groovy

@@ -391,6 +391,7 @@ class SeriesInfoExtractorServiceImplTest extends Specification {
 			service.extractQuantity(fragment) == null
 		where:
 			fragment                                               | _
+			'2 чего-либо'                                          | _
 			'0 марок'                                              | _
 			(SeriesValidation.MAX_STAMPS_IN_SERIES + 1) + ' марок' | _
 	}