design/55022-pgo-implementation.md: fix image paths

For golang/go#55022.

Change-Id: I70ef39ee887026304f7e64e2747a580a0d717ee9
Reviewed-on: https://go-review.googlesource.com/c/proposal/+/439297
Auto-Submit: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
diff --git a/design/55022-pgo-implementation.md b/design/55022-pgo-implementation.md
index f788a10..e9392a7 100644
--- a/design/55022-pgo-implementation.md
+++ b/design/55022-pgo-implementation.md
@@ -47,7 +47,7 @@
 
 ### Standard Compilation flow in Go
 
-![](55025/image1.png)
+![](55022/image1.png)
 
 **Figure 1.** Go compiler.
 
@@ -82,7 +82,7 @@
 
 ### New compilation flow proposed in Go for PGO
 
-![](55025/image2.png)
+![](55022/image2.png)
 
 **Figure 2.** New PGO-enabled Go compiler.