fix(packaging): correct author email hello@ -> info@vibetensor.com (#125)

PyPI package metadata listed the author as 'VIBETENSOR PRIVATE LIMITED
<hello@vibetensor.com>'. The canonical contact is info@vibetensor.com
(matches the npm package maintainer + the org's monitored inbox). Takes
effect on the next PyPI publish (rc3/0.4.0 final); already-published
versions keep the old value. Also fixed the one-pager contact line.

Author: ascender1729

demo/presentation/one-pager.md

@@ -43,7 +43,7 @@ Attestix core is free and open source. Revenue from a managed cloud service with
 - **GitHub:** [github.com/VibeTensor/attestix](https://github.com/VibeTensor/attestix)
 - **PyPI:** `pip install attestix`
 - **Company:** [vibetensor.com](https://vibetensor.com)
-- **Contact:** hello@vibetensor.com
+- **Contact:** info@vibetensor.com
 
 ---
 

pyproject.toml

@@ -10,7 +10,7 @@ readme = "README.md"
 license = {file = "LICENSE"}
 requires-python = ">=3.10"
 authors = [
-    {name = "VIBETENSOR PRIVATE LIMITED", email = "hello@vibetensor.com"},
+    {name = "VIBETENSOR PRIVATE LIMITED", email = "info@vibetensor.com"},
 ]
 keywords = [
     "attestix",