chore: correct wording for the voting window (#14954)

Author: matrei

.github/vote_templates/groovy_pmc.txt

@@ -26,7 +26,7 @@ https://www.apache.org/info/verification.html
 
 Our release process, including verification steps, are documented here: https://github.com/apache/grails-core/blob/HEAD/RELEASE.md The last section of this document `Appendix: Verification from a Container` is likely relevant. For the differing artifacts, we have compared the decompiled classes to ensure they are as we expect to meet the ASF security team's requirements.
 
-The vote for this release is open for the next 72 hours.
+The vote for this release is open for a minimum of 72 hours.
 [ ] +1 Release Apache Grails (incubating) ${VERSION}
 [ ] 0 I don't have a strong opinion about this, but I assume it's ok
 [ ] -1 Do not release Apache Grails (incubating) ${VERSION} because...

.github/vote_templates/staged.txt

@@ -43,7 +43,7 @@ Details of our release process are documented at: https://github.com/apache/grai
 
 As a reminder, most of our tools support an env `GRAILS_REPO_URL` so that the tools can be used from the staging location. Set it to the staging repo like this: `export GRAILS_REPO_URL=https://repository.apache.org/content/groups/staging`
 
-The vote is open for the next 72 hours and passes if a majority of at least
+The vote is open for a minimum of 72 hours and passes if a majority of at least
 three +1 PPMC votes are cast.
 
 [ ] +1 Release Apache Grails (incubating) ${VERSION}

RELEASE.md

@@ -223,7 +223,7 @@ The first vote is conducted on the [Grails dev mailing list](https://lists.apach
 
 ### Apache Groovy PMC
 
-As an incubating project under Apache Groovy, after 72 hours & a successful Grails PPMC vote, the Groovy PMC must vote to approve the Apache Grails (incubating) release. This vote is held on the [Groovy dev mailing list](https://lists.apache.org/list.html?dev@groovy.apache.org). See the source upload job for the generated email.
+As an incubating project under Apache Groovy, after a minimum of 72 hours and a successful Grails PPMC vote, the Groovy PMC must vote to approve the Apache Grails (incubating) release. This vote is held on the [Groovy dev mailing list](https://lists.apache.org/list.html?dev@groovy.apache.org). See the source upload job for the generated email.
 
 ## 5. Releasing