Add post-process-output input to analyze action

Author: mbg

analyze/action.yml

@@ -6,7 +6,7 @@ inputs:
     description: The name of the check run to add text to.
     required: false
   output:
-    description: The path of the directory in which to save the SARIF results
+    description: The path of the directory in which to save the SARIF results from the CodeQL CLI.
     required: false
     default: "../results"
   upload:
@@ -70,6 +70,12 @@ inputs:
     description: Whether to upload the resulting CodeQL database
     required: false
     default: "true"
+  post-process-output:
+    description: >-
+      Before uploading the SARIF files produced by the CodeQL CLI, the CodeQL Action may perform some post-processing
+      on them. Ordinarily, these processed SARIF files are not saved to disk. However, if a path is provided as an
+      argument for this input, they are written to the specified directory.
+    required: false
   wait-for-processing:
     description: If true, the Action will wait for the uploaded SARIF to be processed before completing.
     required: true