Minor typo in line 27, page 354, Figure 8.2 comments, Section 8.1.1, version 2023-04-01

[zhaoyoubing]

Original: "Red cross is the posterior mean" But you cannot find any red crosses in Figure 8.2(b) but only the red line

And according to line 4 in page 359 "The red line shows the posterior mean estimate of the location", "Red cross" should be "Red line"

[murphyk]

fixed