Log Message:
nghttp2 nghttp2-tools: updated to 1.51.0

nghttp2 v1.51.0

lib: add casts to silence implicit conversion warnings (GH-1822)
doc: Update Ubuntu packages based on Ubuntu 22.04 (GH-1812)
doc: Update android build documentation (GH-1806)
build: Bump NDK and others to the latest (GH-1804)
build: Bump OpenSSL versions (GH-1828)
build: Bump libbpf to v1.0.1 (GH-1830)
build: Bump ngtcp2 (GH-1819, GH-1831)
build: Disable python bindings by default because it has been deprecated \ 
(GH-1811, GH-1826, GH-1829)
build: Dockerfile android improvements (GH-1805)
build: Update dependency versions for Dockerfile.android (GH-1802)
third-party: Bump llhttp (GH-1827)
src: Fix test failure on Linux if tz database is not available (GH-1813)
nghttpx: Fix affinity-cookie-stickiness parameter handling (GH-1818)
integration: Add http3 integration test (GH-1832)