Fix crowdin update script (go-gitea#9969)

* Fix crowdin update script

* Refine the script to be specific about what it should change

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

scripts/update-locales.sh

@@ -1,8 +1,13 @@
 #!/bin/sh
 
 mv ./options/locale/locale_en-US.ini ./options/
-sed -i -e 's/=\"/=/g' -e 's/\"$$//g' ./options/locale/*.ini
-sed -i -e 's/\\\\\\\\\"/\"/g' ./options/locale/*.ini
+
+# Make sure to only change lines that have the translation enclosed between quotes
+sed -i -r -e '/^[a-zA-Z0-9_-.]+[ ]*=[ ]*".*"$/ {
+	s/^([a-zA-Z0-9_-.]+)[ ]*="/\1=/
+	s/\\"/"/g
+	s/"$//
+	}' ./options/locale/*.ini
 
 # Remove translation under 25% of en_us
 baselines=`wc -l "./options/locale_en-US.ini" | cut -d" " -f1`