Fix typo mintained -> maintained

Signed-off-by: Osman Karaketir <[email protected]>

Author: karaketir16

README.md

@@ -197,7 +197,7 @@ simulator for the elf and linux toolchains. The simulator can be selected
 by the SIM variable in the Makefile, e.g. SIM=qemu, SIM=gdb, or SIM=spike
 (experimental).In addition, the simulator can also be selected with the 
 configure time option `--with-sim=`.However, the testsuite allowlist is 
-only mintained for qemu.Other simulators might get extra failures.
+only maintained for qemu.Other simulators might get extra failures.
 
 #### Additional Prerequisite