Minor cleanup to README doc

Author: sirosen

README.md

@@ -6,7 +6,7 @@
 
 # check-jsonschema
 
-A [pre-commit](https://pre-commit.com/) hook for checking files against a [JSONSchema](https://json-schema.org/), built using the python [jsonschema](https://github.com/Julian/jsonschema/) package.
+A JSON Schema CLI and [pre-commit](https://pre-commit.com/) hook built on [jsonschema](https://github.com/python-jsonschema/jsonschema/).
 The schema may be specified as a local or remote (HTTP or HTTPS) file.
 
 Remote files are automatically downloaded and cached if possible.
@@ -103,7 +103,13 @@ And to check with the builtin schema that a GitHub workflow sets
 
 ## Standalone Usage
 
-You can also `pip install check-jsonschema` to run the tool manually.
+To use as a CLI tool, install with `pip`
+
+    pip install check-jsonschema
+
+or `pipx`
+
+    pipx install check-jsonschema
 
 For full usage info: