Bump server/admin-tools to 1.31.0, UI to 2.49.1 (#148)

Bump default Temporal versions in `compose/.env` to align with the
v1.31.0 OSS server release.

| Variable | Before | After |
|---|---|---|
| `TEMPORAL_VERSION` | 1.30.1 | **1.31.0** |
| `TEMPORAL_ADMINTOOLS_VERSION` | 1.30.1 | **1.31.0** |
| `TEMPORAL_UI_VERSION` | 2.34.0 | **2.49.1** |

These match the freshly promoted Docker images:
- `temporalio/server:1.31.0`
(https://github.com/temporalio/temporal/releases/tag/v1.31.0)
- `temporalio/admin-tools:1.31.0` (built with embedded CLI v1.7.0)
- `temporalio/ui:2.49.1` (current UI Server Latest)

Author: prathyushpv

compose/.env

@@ -2,9 +2,9 @@ COMPOSE_PROJECT_NAME=temporal
 CASSANDRA_VERSION=3.11.9
 ELASTICSEARCH_VERSION=7.17.27
 MYSQL_VERSION=8
-TEMPORAL_VERSION=1.30.1
-TEMPORAL_ADMINTOOLS_VERSION=1.30.1
-TEMPORAL_UI_VERSION=2.34.0
+TEMPORAL_VERSION=1.31.0
+TEMPORAL_ADMINTOOLS_VERSION=1.31.0
+TEMPORAL_UI_VERSION=2.49.1
 POSTGRESQL_VERSION=16
 POSTGRES_PASSWORD=temporal
 POSTGRES_USER=temporal