Update dependency nghttp2/nghttp2 to v1.44.0

This MR contains the following updates:

Package	Type	Update	Change
nghttp2/nghttp2	ironbank-github	minor	v1.43.0 -> v1.44.0

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Release Notes

nghttp2/nghttp2

v1.44.0

Compare Source

lib: Port new ngtcp2 map implementation doc: Replace master with main build: Add precious variables for libev and jemalloc and use JEMALLOC_CFLAGS build: Add more --with-* configure flags build: Add LIBTOOL_LDFLAGS configure variable third-party: Bump llhttp to 6.0.2 src: Replace black-list with block-list nghttpx: Fix max distance in weight group/address cycle comparison nghttpx: Set connect_blocker and live_check after shuffling addresses nghttpx: Replace master with main nghttpx: Remove trailing white space after $method log variable (GH-1553) h2load: Add --rps option (GH-1559) h2load: Allow unit in -D option asio: fix some typos (Patch from Jan Kundrát) (GH-1550)

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