fix: restore registry-url and fix package.json repository url

OIDC auth was working in v1.0.2 run (provenance was signed).
The 404 was caused by trying to republish an already-existing version.
Also fix repository.url format per npm pkg fix suggestion.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: klocus

.github/workflows/publish.yml

@@ -34,6 +34,7 @@ jobs:
         with:
           node-version: '18'
           cache: 'npm'
+          registry-url: 'https://registry.npmjs.org'
 
       - name: Install dependencies
         run: npm ci

package.json

@@ -4,7 +4,7 @@
   "description": "OpenCode plugin that injects path-specific *.instructions.md files from .github/instructions and .opencode/instructions",
   "repository": {
     "type": "git",
-    "url": "https://github.com/klocus/opencode-path-instructions.git"
+    "url": "git+https://github.com/klocus/opencode-path-instructions.git"
   },
   "author": "Paweł Klockiewicz",
   "license": "MIT",