chore: Added README.md

README.md

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+# Enforce Pull Request Description Length Action
+
+This action checks that a Pull Request Description is at a minimum length.  By default the minimum length is one.  If a different minimum length is needed it can be passed in using an Action Input. 
+
+## Inputs
+
+### `minLength`
+
+A specific minimum length the description must be. 
+
+## Example Usage
+
+```
+- name: Enforce Jira Issue Key in Pull Request Title
+  uses: ryanvade/enforce-pr-description-length-action@v1
+```
+
+## Example Usage with a specific min length
+
+```
+- name: Enforce Jira Issue Key in Pull Request Title
+  uses: ryanvade/enforce-pr-description-length-action@v1
+  with:
+    minLength: 5
+```