Update SFR Box unit of measurement (home-assistant#157813)

Author: epenet

homeassistant/components/sfr_box/strings.json

@@ -60,7 +60,7 @@
       },
       "dsl_connect_count": {
         "name": "DSL connect count",
-        "unit_of_measurement": "connects"
+        "unit_of_measurement": "attempts"
       },
       "dsl_crc_error_count": {
         "name": "DSL CRC error count",

tests/components/sfr_box/snapshots/test_sensor.ambr

@@ -137,14 +137,14 @@
     'supported_features': 0,
     'translation_key': 'dsl_connect_count',
     'unique_id': 'e4:5d:51:00:11:22_dsl_counter',
-    'unit_of_measurement': 'connects',
+    'unit_of_measurement': 'attempts',
   })
 # ---
 # name: test_sensors[sensor.sfr_box_dsl_connect_count-state]
   StateSnapshot({
     'attributes': ReadOnlyDict({
       'friendly_name': 'SFR Box DSL connect count',
-      'unit_of_measurement': 'connects',
+      'unit_of_measurement': 'attempts',
     }),
     'context': <ANY>,
     'entity_id': 'sensor.sfr_box_dsl_connect_count',