add redis deps to docs

Author: jonhealy1

stac_fastapi/elasticsearch/pyproject.toml

@@ -54,6 +54,8 @@ docs = [
     "mkdocs~=1.4.0",
     "mkdocs-material~=9.0.0",
     "pdocs~=1.2.0",
+    "redis~=6.4.0",
+    "retry~=0.9.2",
 ]
 redis = [
     "stac-fastapi-core[redis]==6.7.5",