Update dependency poetry to v1.6.0

Author: renovate[bot]

pyproject.toml

@@ -72,7 +72,7 @@ Django = {version = "^4.0.0"}
 check-manifest = {version = "^0.48", python = "^3.6"}
 bump2version = {version = "^1.0.0", python = "^3.6"}
 git-changelog = {version = "^1.0.0", python = "^3.6.2"}
-poetry = "=1.1.14"
+poetry = "=1.6.0"
 sphinx = "=4.5.0"
 sphinx-autobuild = "^2021.0.0"
 sphinx_rtd_theme = "^1.0.0"