Add make rule to update dependencies

This will call poetry update to update Python
dependencies for the project, like part of

https://github.com/quipucords/quipucords/blob/main/Makefile#L86

Makefile

@@ -11,6 +11,7 @@ help:
 	@echo "  install-dev       to install in editable mode plus the "
 	@echo "                    dev packages and install pre-commit hooks"
 	@echo "  lint              to run all linters"
+	@echo "  update-deps	   to update the dependencies"
 	@echo "  pre-commit        to run pre-commit against all the files"
 	@echo "  test              to run unit tests"
 	@echo "  test-coverage     to run unit tests and measure test coverage"
@@ -36,6 +37,9 @@ install-dev:
 	poetry install --with dev
 	poetry run pre-commit install --install-hooks
 
+update-deps:
+	poetry update --no-cache
+
 pre-commit:
 	poetry run pre-commit run --all-files