Move to clang-format-8

Moved to clang-format-8 here:
https://gerrit.openbmc-project.xyz/c/openbmc/openbmc-build-scripts/+/23087

Change-Id: I48f4fd4163581e7a8eaec260a52deb7da42b5b05
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/format-code.sh b/format-code.sh
index afcf8c4..d298d36 100755
--- a/format-code.sh
+++ b/format-code.sh
@@ -18,6 +18,6 @@
 # formatting due to some imported code in webui
 
 if [ -f ".clang-format" ]; then
-    clang-format-6.0 -i `git ls-files '*.js'`
+    clang-format-8 -i `git ls-files '*.js'`
     git --no-pager diff --exit-code
 fi