Add package.json to node-version-file list of examples. (actions#879)

Author: TWiStErRob

README.md

@@ -25,7 +25,7 @@ See [action.yml](action.yml)
     # Examples: 12.x, 10.15.1, >=10.15.0, lts/Hydrogen, 16-nightly, latest, node
     node-version: ''
 
-    # File containing the version Spec of the version to use.  Examples: .nvmrc, .node-version, .tool-versions.
+    # File containing the version Spec of the version to use.  Examples: package.json, .nvmrc, .node-version, .tool-versions.
     # If node-version and node-version-file are both provided the action will use version from node-version. 
     node-version-file: ''
 

action.yml

@@ -8,7 +8,7 @@ inputs:
   node-version:
     description: 'Version Spec of the version to use. Examples: 12.x, 10.15.1, >=10.15.0.'
   node-version-file:
-    description: 'File containing the version Spec of the version to use.  Examples: .nvmrc, .node-version, .tool-versions.'
+    description: 'File containing the version Spec of the version to use.  Examples: package.json, .nvmrc, .node-version, .tool-versions.'
   architecture:
     description: 'Target architecture for Node to use. Examples: x86, x64. Will use system architecture by default.'
   check-latest: