hotfix: freeze MarkupSafe version to 2.0.1

Author: galacticglum

poetry.lock

@@ -3,6 +3,9 @@ name = "sqrl-server"
 version = "0.1.0"
 description = ""
 authors = ["Your Name <you@example.com>"]
+packages = [
+    { include = "sqrl" }
+]
 
 [tool.poetry.dependencies]
 python = "^3.9"
@@ -18,6 +21,7 @@ tqdm = "^4.64.0"
 yaspin = "^2.1.0"
 petname = "^2.6"
 setuptools = "^62.5.0"
+MarkupSafe = "2.0.1"
 
 [tool.poetry.dev-dependencies]
 pytest = "^7.1.2"