app/matrix: fix secret in matrix.0x3c.pl

Change-Id: Iffd361b6fde96e9a6c3967bc88c730b5acf14082
diff --git a/app/matrix/matrix.0x3c.pl.jsonnet b/app/matrix/matrix.0x3c.pl.jsonnet
index b84bbfb..5a580ad 100644
--- a/app/matrix/matrix.0x3c.pl.jsonnet
+++ b/app/matrix/matrix.0x3c.pl.jsonnet
@@ -13,7 +13,7 @@
             enable: true,
             oauth2: {
                 clientID: "YCWg1Qor9YstKn_yAHB_NT3GFAGqbnDFzIwyI_fCUWI",
-                clientSecret: (std.split(importstr "secrets/cipher/cas-proxy-0x3c-0auth2-secret", "\n"))[0],
+                clientSecret: (std.split(importstr "secrets/plain/cas-proxy-0x3c-0auth2-secret", "\n"))[0],
                 scope: "read:accounts",
                 authorizeURL: "https://0x3c.pl/oauth/authorize",
                 tokenURL: "https://0x3c.pl/oauth/token",