add Operator Framework chairs

Signed-off-by: Edmund Ochieng <ochienged@gmail.com>

Author: OchiengEd

chairs.md

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+# Operator Framework Chairs
+
+Following the Operator Framework chair elections held between July 21 to August 8, 2025; the elected chairs are as shown below:
+
+* Joe Lanford (**[@joelanford](https://github.com/joelanford)**)
+* Camila Macedo (**[@camilamacedo86](https://github.com/camilamacedo86)**)
+* Jordan Keister (**[@grokspawn](https://github.com/grokspawn)**)
+* Attila Mészáros (**[@csviri](https://github.com/csviri)**)
+* Kevin Rizza (**[@kevinrizza](https://github.com/kevinrizza)**)
+* Christophe LAPRUN (**[@metacosm](https://github.com/metacosm)**)
+* Tayler Geiger (**[@trgeiger](https://github.com/trgeiger)**)