Add flag to README

Author: janhoy

pelican/README.md

@@ -1,7 +1,8 @@
 # ASF Infrastructure Pelican Action
 
 ## Inputs
-* destination 	Pelican Output branch (required) 	 	default: asf-site
+* destination 	Pelican Output branch (optional) 	 	default: asf-site
+* publish 	Publish to destination branch (optional) 	default: true
 * gfm 	 	Uses GitHub Flavored Markdown (optional) 	default: true
 * output 	 	Pelican generated output directory (optional) 	default: output
 * tempdir 	Temporary Directory name (optional) 	 	default: ../output
@@ -22,7 +23,6 @@ jobs:
         with:
           destination: master
           gfm: 'true'
-          publish: 'true'
 ```
 
 Example workflow for only building the site, not publishing. Useful for PR tests:
@@ -37,7 +37,6 @@ jobs:
         with:
       - uses: apache/infrastructure-actions/pelican@main
         with:
-          gfm: 'true'
           publish: 'false'
 ```