Update release notes 1.92 (#1480)

Author: vissarion

doc/release_notes.qbk

@@ -34,6 +34,7 @@
 * [@https://github.com/boostorg/geometry/issues/1399 1399] unit test index_rtree_exceptions_rst fails
 * [@https://github.com/boostorg/geometry/issues/1452 1452] performance regression on GCC
 * [@https://github.com/boostorg/geometry/issues/714 714] missing citation guidelines
+* [@https://github.com/boostorg/geometry/issues/1471 1471] Two almost identical rectangles have no intersection
 * Various fixes of errors and warnings
 
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