Fix --export-gpg command to properly include cipher in exported .asc file

Thanks to YggdrasiI for reporting this bug:
#190 (comment)

Author: jmurty

CHANGELOG.md

@@ -41,6 +41,7 @@ system, you must also run the `--upgrade` command in each repository:
   (#189)
 - Fail with error when an empty password is provided to the -p or --password
   options #188
+- Fix --export-gpg command to properly include cipher in exported .asc file
 
 ## [2.3.0] - 2024-09-10
 

transcrypt

@@ -1072,7 +1072,7 @@ export_gpg() {
 	fi
 
 	local current_cipher
-	current_cipher=$(git config --get --local "transcrypt${CONTEXT_CONFIG_GROUP}cipher")
+	current_cipher=$(git config --get --local "transcrypt${CONTEXT_CONFIG_GROUP}.cipher")
 	local current_password
 	current_password=$(load_password "$CONTEXT_CONFIG_GROUP")
 	mkdir -p "${CRYPT_DIR}"