databases/mongodb70: update to RC8

Release Candidate

Please read the notes before using:
https://www.mongodb.com/docs/v7.0/release-notes/7.0/#release-notes-for-mongodb-7.0--release-candidate-

* trivial version bump
* typo in pkg-message
* poudriere stage-qa: ok

databases/mongodb70/Makefile

 PORTNAME=	mongodb
 DISTVERSIONPREFIX=	r
-DISTVERSION=	7.0.0-rc7
+DISTVERSION=	7.0.0-rc8
 CATEGORIES=	databases net
 PKGNAMESUFFIX=	${DISTVERSION:R:S/.//}
 

databases/mongodb70/distinfo

-TIMESTAMP = 1689068153
-SHA256 (mongodb-mongo-r7.0.0-rc7_GH0.tar.gz) = affbd9250b28650757653f97097dd4d25332e6a44191990e966f2f87981364b3
-SIZE (mongodb-mongo-r7.0.0-rc7_GH0.tar.gz) = 113448879
+TIMESTAMP = 1690182724
+SHA256 (mongodb-mongo-r7.0.0-rc8_GH0.tar.gz) = ccf8636ae7d653e55ff50fb038a5e2821d60e1be640da95f4a7718ea7a37035c
+SIZE (mongodb-mongo-r7.0.0-rc8_GH0.tar.gz) = 113469461
 SHA256 (mongodb-forks-spidermonkey-82aac6af18abcd5bf188afbc821779ccb0ca0902_GH0.tar.gz) = a365bf54ef4e4fd6a136cf6afa9c620ba0c8982402473b9bfac38928a688a9e0
 SIZE (mongodb-forks-spidermonkey-82aac6af18abcd5bf188afbc821779ccb0ca0902_GH0.tar.gz) = 141291901

databases/mongodb70/pkg-message

 [
 { type: install
   message: <<EOM
-MongoDB on Rasperry Pi can work but is unsupported upstream.
+MongoDB on Raspberry Pi can work but is unsupported upstream.
 Please read https://jira.mongodb.org/browse/SERVER-71772 if you run this on a non-LSE ARM cpu.
 EOM
 }