docs: fix install command with extra-index-url, bump to 0.1.2

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

README.md

@@ -12,7 +12,7 @@ Python SDK для работы с API ErGPT.
 ## Установка
 
 ```bash
-pip install --index-url https://git.infra.er-gpt.ru/api/packages/ergpt/pypi/simple sdk
+pip install --extra-index-url https://git.infra.er-gpt.ru/api/packages/ergpt/pypi/simple sdk
 ```
 
 ## Быстрый старт

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "sdk"
-version = "0.1.1"
+version = "0.1.2"
 description = "ErGPT Knowledge Base API SDK"
 readme = "README.md"
 requires-python = ">=3.12"

uv.lock

@@ -672,7 +672,7 @@ wheels = [
 
 [[package]]
 name = "sdk"
-version = "0.1.1"
+version = "0.1.2"
 source = { virtual = "." }
 dependencies = [
     { name = "httpx" },