Align the CII-Best-Practices requirements with the documentation (#129)

The remediation section states that only a passing score is required for this check to pass:
> We give full credit to projects that meet the passing criteria, which is a significant achievement for many projects.

A passing score currently equals 5.
https://github.com/ossf/scorecard/blob/e128c3de82607e1b285185da9c76a5262255b180/checks/cii_best_practices.go

See #110 for more details.

Co-authored-by: laurentsimon <64505099+laurentsimon@users.noreply.github.com>

policies/template.yml

@@ -57,7 +57,8 @@ policies:
       score: 10
       mode: enforced
   CII-Best-Practices:
-      score: 10
+      # passing score
+      score: 5
       mode: enforced
   Vulnerabilities:
       score: 10