Fix a broken link
I left out a `0` at the end of the reference for `ICBI` in the comments for the PowerPC version of `MeasureReadLatency`.
diff --git a/demos/asm/measurereadlatency_ppc64le.S b/demos/asm/measurereadlatency_ppc64le.S
index dfed5f5..a4ff148 100644
--- a/demos/asm/measurereadlatency_ppc64le.S
+++ b/demos/asm/measurereadlatency_ppc64le.S
@@ -35,7 +35,7 @@
// devices: https://git.io/Je60x
//
// [1] SYNC: https://cpu.fyi/d/a48#G19.1034642
- // [2] ICBI: https://cpu.fyi/d/a48#G19.102046
+ // [2] ICBI: https://cpu.fyi/d/a48#G19.1020460
// [3] ISYNC: https://cpu.fyi/d/a48#G19.1020771
isync
sync