Fix pr-drools-docs.yml when version is incremented

[tkobayas]

apache/incubator-kie-drools#5589 (comment)

GHA Drools Docs fails when the version is incremented but not yet deployed.

2023-11-23T12:59:50.8675151Z [ERROR] [ERROR] Some problems were encountered while processing the POMs:
2023-11-23T12:59:50.8678934Z [WARNING] 'dependencyManagement.dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.glassfish.jaxb:jaxb-runtime:jar -> version 4.0.3 vs ${version.org.glassfish.jaxb} @ org.kie:drools-build-parent:9.45.0-SNAPSHOT, /home/runner/work/incubator-kie-drools/incubator-kie-drools/build-parent/pom.xml, line 426, column 19
2023-11-23T12:59:50.8683177Z [WARNING] 'build.plugins.plugin.version' for com.github.eirslett:frontend-maven-plugin is missing. @ line 72, column 15
2023-11-23T12:59:50.8687638Z [ERROR] Non-resolvable import POM: Could not find artifact org.kie:kie-core-bom:pom:9.45.0-SNAPSHOT in apache-public-repository-group (https://repository.apache.org/content/groups/public/) @ org.kie:drools-build-parent:9.45.0-SNAPSHOT, /home/runner/work/incubator-kie-drools/incubator-kie-drools/build-parent/pom.xml, line 1257, column 19
2023-11-23T12:59:50.8693375Z [ERROR] Non-resolvable import POM: Could not find artifact org.drools:drools-bom:pom:9.45.0-SNAPSHOT in apache-public-repository-group (https://repository.apache.org/content/groups/public/) @ org.kie:drools-build-parent:9.45.0-SNAPSHOT, /home/runner/work/incubator-kie-drools/incubator-kie-drools/build-parent/pom.xml, line 1264, column 19
2023-11-23T12:59:50.8699586Z [ERROR] Non-resolvable import POM: Could not find artifact org.kie:kie-efesto-bom:pom:9.45.0-SNAPSHOT in apache-public-repository-group (https://repository.apache.org/content/groups/public/) @ org.kie:drools-build-parent:9.45.0-SNAPSHOT, /home/runner/work/incubator-kie-drools/incubator-kie-drools/build-parent/pom.xml, line 1271, column 19
2023-11-23T12:59:50.8705496Z [ERROR] Non-resolvable import POM: Could not find artifact org.kie:kie-dmn-bom:pom:9.45.0-SNAPSHOT in apache-public-repository-group (https://repository.apache.org/content/groups/public/) @ org.kie:drools-build-parent:9.45.0-SNAPSHOT, /home/runner/work/incubator-kie-drools/incubator-kie-drools/build-parent/pom.xml, line 1278, column 19
2023-11-23T12:59:50.8711373Z [ERROR] Non-resolvable import POM: Could not find artifact org.kie:kie-pmml-bom:pom:9.45.0-SNAPSHOT in apache-public-repository-group (https://repository.apache.org/content/groups/public/) @ org.kie:drools-build-parent:9.45.0-SNAPSHOT, /home/runner/work/incubator-kie-drools/incubator-kie-drools/build-parent/pom.xml, line 1285, column 19
2023-11-23T12:59:50.8714765Z  @
2023-11-23T12:59:50.8715659Z [ERROR] The build could not read 1 project -> [Help 1]

This could be fixed somehow.