Update aiohttp requirement from <3.11,>=3.8 to >=3.8,<3.12

Updates the requirements on [aiohttp](https://github.com/aio-libs/aiohttp) to permit the latest version.
- [Release notes](https://github.com/aio-libs/aiohttp/releases)
- [Changelog](https://github.com/aio-libs/aiohttp/blob/master/CHANGES.rst)
- [Commits](aio-libs/aiohttp@v3.8.0...v3.11.8)

---
updated-dependencies:
- dependency-name: aiohttp
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -51,12 +51,12 @@ content-type = "text/markdown"
 Homepage = "https://github.com/MatthiasValvekens/certvalidator"
 
 [project.optional-dependencies]
-async-http = ["aiohttp>=3.8,<3.11"]
+async-http = ["aiohttp>=3.8,<3.12"]
 testing = [
     "pytest>=6.1.1",
     "pytest-cov>=4.0,<6.1",
     "freezegun>=1.1.0",
-    "aiohttp>=3.8,<3.11",
+    "aiohttp>=3.8,<3.12",
     "pytest-aiohttp~=1.0.4",
     "pyhanko-certvalidator[async-http]",
 ]