Fix CI badge and update release instructions

Updated CI badge link and corrected release instructions.

Author: tlambert03

README.md

@@ -4,7 +4,7 @@
 [![PyPI](https://img.shields.io/pypi/v/napari-bioformats.svg?color=green)](https://pypi.org/project/napari-bioformats)
 [![Conda](https://img.shields.io/conda/v/conda-forge/napari-bioformats)](https://anaconda.org/conda-forge/napari-bioformats)
 [![Python Version](https://img.shields.io/pypi/pyversions/napari-bioformats.svg?color=green)](https://python.org)
-[![tests](https://github.com/imaging-formats/napari-bioformats/workflows/tests/badge.svg)](https://github.com/imaging-formats/napari-bioformats/actions)
+[![tests](https://github.com/imaging-formats/napari-bioformats/actions/workflows/ci.yml/badge.svg)](https://github.com/imaging-formats/napari-bioformats/actions/workflows/ci.yml)
 [![codecov](https://codecov.io/gh/imaging-formats/napari-bioformats/branch/master/graph/badge.svg)](https://codecov.io/gh/imaging-formats/napari-bioformats)
 
 Bioformats plugin for napari using [bffile](https://github.com/imaging-formats/bffile)
@@ -15,7 +15,7 @@ Anyone with write access can create a release:
 
 1. **Locally:**
 
-   checkout the version you want to release, then run:
+   checkout the commit you want to release, then run:
 
    ```bash
    git tag -a vX.Y.Z -m vX.Y.Z