Backports to v6.0: Removes RHEL 7.x from dropdown option list in docs (#164) (#166)

Backports #164 

[Build](https://workerpool-boxgs.mongodbstitch.com/pages/job.html?collName=queue&jobId=660ef2203a5920a29123b84f)

Author: sarahsimpers

snooty.toml

@@ -61,7 +61,7 @@ agent-dl-rpm-rhel-6-x64 = "Amazon Linux - RPM"
 agent-dl-rpm-rhel-7-ppc = "RHEL/CentOS (7.X) Power (ppc64le) - RPM"
 agent-dl-rpm-rhel-7-x64 = "RHEL/CentOS (7.X), SUSE12, Amazon Linux2 - RPM"
 agent-dl-rpm-rhel-7-8-zSeries = "RHEL 7.X/8X Z-Series (s390x) - RPM"
-agent-dl-rpm-rhel-8-arm64 = "RHEL/CentOS (7.X/8.X/9.X), Amazon Linux2, Amazon Linux 2023 - RPM (ARM)"
+agent-dl-rpm-rhel-8-arm64 = "RHEL/CentOS (8.X/9.X), Amazon Linux2, Amazon Linux 2023 - RPM (ARM)"
 agent-dl-tar-other-linux = "Other Linux - TAR"
 agent-dl-tar-rhel-7-ppc = "RHEL/CentOS (7.X) Power (ppc64le) - TAR"
 agent-dl-tar-rhel-7-x64 = "RHEL/CentOS (7.X), SUSE12, Amazon Linux 2 - TAR"