fix(docs): update doc version based on tag

docs/Makefile

@@ -1,4 +1,7 @@
-doc:
+update_doc_version:
+	sed -i "s/release = '.*'/release = '`git describe --tags --abbrev=0`'/g" conf.py
+
+doc: update_doc_version
 	cd ../compiler; make doc python-bindings
 	bash symlink_md.bash
 	bash symlink_py.bash
@@ -9,3 +12,5 @@ clean:
 	rm -rf _build/
 	rm -rf links_to_compiler_build/
 	rm -rf python_api/*
+
+.PHONY: update_doc_version

docs/conf.py

@@ -30,7 +30,7 @@ root_url = os.environ.get("DOC_ROOT_URL", "/concrete-compiler")
 root_url = root_url if root_url.endswith('/') else root_url + '/'
 
 # The full version, including alpha/beta/rc tags
-release = 'v0.1.0-alpha'
+release = 'v0.1.1'
 
 
 # -- General configuration ---------------------------------------------------