chore(deps): update docker.io/library/python docker tag to v3.15

pkg/Dockerfile

@@ -1,5 +1,5 @@
 # 3.13, because with 3.14 it requires gcc (wheels not available)
-FROM docker.io/library/python:3.14-slim
+FROM docker.io/library/python:3.15-slim
 
 # Set environment variables
 ENV PYTHONDONTWRITEBYTECODE=1

renovate.json

@@ -1,13 +1,5 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "packageRules": [
-    {
-      "description": "Hold python (actions/setup-python) at 3.14 until onnxruntime publishes py3.15 wheels — fastembed requires onnxruntime>=1.24.2 on py>=3.14 and there is no cp315 distribution yet (PR #55 CI: ResolutionImpossible). Re-evaluate once onnxruntime ships 3.15 wheels, then remove this rule.",
-      "matchDepNames": ["python"],
-      "matchDatasources": ["github-tags"],
-      "allowedVersions": "/^3\\.1[0-4](\\.|$)/"
-    }
-  ],
   "customManagers": [
     {
       "customType": "regex",