readme: upd link

gromnitsky · gromnitsky · commit 0352c97f61da · 2023-05-26T20:37:55.000+03:00
diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 # crx3-utils
 
-http://gromnitsky.blogspot.com/2019/04/crx3.html
+https://sigwait.org/~alex/blog/2019/04/01/crx3.html
 
 Starting with Chrome 73, Chrome changed the package format for
 extensions to the CRX3 file format.
