devtools/credit: add aliases of previous namers

It was suggesting past namers as new namers.
Changelog-None

Author: endothermicdev

devtools/credit

@@ -20,6 +20,8 @@ fi
 git log "$PREV_TAG".. --format="%an|%ae" | sort | uniq -c | sort -rn > /tmp/authors.$$
 sed -n 's/.*[Nn]amed by //p' < CHANGELOG.md | sed 's/(.*)//' | tr -dc '[:alnum:][:space:]' > /tmp/namers.$$
 git log "$PREV_TAG" --format="%an|%ae" | sort -u > /tmp/prev-authors.$$
+# Include aliases
+printf "Alex Myers\nShahanaFarooqui\nMatt Whitlock\n" >> /tmp/namers.$$
 
 NAMER=""
 BACKUP_NAMER=""