fix: add new env variables ODTP_PASSWORD on env dist (#255)

Update `.env.dist` to include `ODTP_PASSWORD`

Author: sabinem

.env.dist

@@ -15,6 +15,12 @@
 # your github token
 GITHUB_TOKEN=
 
+# ===========================================================
+# Credentials for odtp: to decrypt secret files
+# ===========================================================
+
+ODTP_PASSWORD=
+
 # ===========================================================
 # Credentials that you can choose on setup
 # - needed for all setup methods