Give publish job write permission for id token (#51)

## Description

<!-- Describe your changes in detail -->
<!-- Does this fix a bug, implement a new feature, etc? -->
- Give write permission to id-token. See
[docs](https://docs.npmjs.com/generating-provenance-statements#publishing-packages-with-provenance-via-github-actions)
for more info

### Related Issue(s)

<!-- Reference the issue this PR relates to -->
<!-- Use keywords if possible (ex. Closes #10 ) -->
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https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/using-keywords-in-issues-and-pull-requests
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## Screenshots

<!-- (if applicable) -->

.github/workflows/publish.yml

@@ -5,6 +5,9 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
     steps:
       - uses: actions/checkout@v4
       # Setup .npmrc file to publish to npm

package.json

@@ -3,7 +3,7 @@
   "description": "Generators for OSR-style tabletop roleplaying games",
   "repository": {
     "type": "github",
-    "url": "https://github.com/riccjohn/osr-generators"
+    "url": "git+https://github.com/riccjohn/osr-generators.git"
   },
   "private": false,
   "version": "0.0.2",