Generate docs for last 6 tags.

(cherry picked from commit d23a24a35c42ee8e32b2e7662559a4218c58d1b8)

Author: mbrandonw

.github/workflows/documentation.yml

@@ -60,7 +60,7 @@ jobs:
           rm -rf docs-out/protocol-beta;
           git tag -l --sort=-v:refname | grep -e "\d\+\.\d\+.0" | tail -n +10 | xargs -I {} rm -rf docs-out/{};
 
-          for tag in $(echo "main"; echo "protocol-beta"; git tag -l --sort=-v:refname | grep -e "\d\+\.\d\+.0" | head -10);
+          for tag in $(echo "main"; echo "protocol-beta"; git tag -l --sort=-v:refname | grep -e "\d\+\.\d\+.0" | head -6);
           do
             echo "⏳ Generating documentation for "$tag" release.";