readme updates for v2 release

Signed-off-by: Brian DeHamer <[email protected]>

README.md

@@ -65,7 +65,7 @@ See [action.yml](action.yml)
   with:
     # Path to the artifact serving as the subject of the attestation. Must
     # specify exactly one of "subject-path" or "subject-digest". May contain
-    # a glob pattern or list of paths (total subject count cannot exceed 2500).
+    # a glob pattern or list of paths (total subject count cannot exceed 1024).
     subject-path:
 
     # SHA256 digest of the subject for the attestation. Must be in the form
@@ -111,7 +111,7 @@ See [action.yml](action.yml)
 
 | Name          | Description                                                    | Example                  |
 | ------------- | -------------------------------------------------------------- | ------------------------ |
-| `bundle-path` | Absolute path to the file containing the generated attestation | `/tmp/attestation.jsonl` |
+| `bundle-path` | Absolute path to the file containing the generated attestation | `/tmp/attestation.json` |
 
 <!-- markdownlint-enable MD013 -->
 
@@ -166,8 +166,8 @@ jobs:
 
 ### Identify Multiple Subjects
 
-If you are generating multiple artifacts, you can generate an attestation for
-each by using a wildcard in the `subject-path` input.
+If you are generating multiple artifacts, you can attest all of them at the
+same time by using a wildcard in the `subject-path` input.
 
 ```yaml
 - uses: actions/attest@v1

__tests__/main.test.ts

@@ -197,7 +197,7 @@ describe('action', () => {
       expect(setOutputMock).toHaveBeenNthCalledWith(
         1,
         'bundle-path',
-        expect.stringMatching('attestation.jsonl')
+        expect.stringMatching('attestation.json')
       )
       expect(setFailedMock).not.toHaveBeenCalled()
     })
@@ -283,7 +283,7 @@ describe('action', () => {
       expect(setOutputMock).toHaveBeenNthCalledWith(
         1,
         'bundle-path',
-        expect.stringMatching('attestation.jsonl')
+        expect.stringMatching('attestation.json')
       )
       expect(setFailedMock).not.toHaveBeenCalled()
     })

action.yml

@@ -10,7 +10,7 @@ inputs:
     description: >
       Path to the artifact serving as the subject of the attestation. Must
       specify exactly one of "subject-path" or "subject-digest". May contain a
-      glob pattern or list of paths (total subject count cannot exceed 2500).
+      glob pattern or list of paths (total subject count cannot exceed 1024).
     required: false
   subject-digest:
     description: >
@@ -60,7 +60,7 @@ inputs:
     required: false
 outputs:
   bundle-path:
-    description: 'The path to the file containing the attestation bundle(s).'
+    description: 'The path to the file containing the attestation bundle.'
 
 runs:
   using: node20

src/main.ts

@@ -15,7 +15,7 @@ import {
 
 import type { Subject } from '@actions/attest'
 
-const ATTESTATION_FILE_NAME = 'attestation.jsonl'
+const ATTESTATION_FILE_NAME = 'attestation.json'
 
 export type RunInputs = SubjectInputs &
   PredicateInputs & {