Fix a typo in action.yml

Co-authored-by: Konrad Pabjan <konradpabjan@github.com>

action.yml

@@ -1,5 +1,5 @@
 name: 'Publish action versions'
-description: 'Move the major version tag to point to the specified ref'
+description: 'Move the major version tag to point to a specified ref'
 inputs:
   source-tag:
     description: 'Tag name that the major tag will point to. Examples: v1.2.3, 1.2.3'
@@ -12,4 +12,4 @@ outputs:
     description: 'The major version tag that has been updated (created). Examples: v1, 1'
 runs:
   using: 'node12'
-  main: 'dist/index.js'
+  main: 'dist/index.js'