riscv: entry: fix typo in comment 'instruciton' -> 'instruction'

Fix a typo in a comment in the RISC-V entry.S.

Signed-off-by: Florian Schmaus <flo@geekplace.eu>
Link: https://lore.kernel.org/r/20251006093742.53925-1-flo@geekplace.eu
[pjw@kernel.org: wrote a basic patch description]
Signed-off-by: Paul Walmsley <pjw@kernel.org>

Author: Flowdalic

arch/riscv/kernel/entry.S

@@ -455,7 +455,7 @@ SYM_DATA_START_LOCAL(excp_vect_table)
 	RISCV_PTR do_trap_ecall_s
 	RISCV_PTR do_trap_unknown
 	RISCV_PTR do_trap_ecall_m
-	/* instruciton page fault */
+	/* instruction page fault */
 	ALT_PAGE_FAULT(RISCV_PTR do_page_fault)
 	RISCV_PTR do_page_fault   /* load page fault */
 	RISCV_PTR do_trap_unknown