swimming_bathing: use new Font Awesome icons

swimming_bathing.json

@@ -103,7 +103,7 @@
           "zoom": 13,
           "append": "tag:sport=swimming",
           "taginfo": "natural=water, sport=swimming",
-          "sign": "<img data-src='maki:swimming?fill=blue'>"
+          "sign": "<i style='color: blue' class=\"fas fa-water\"></i>"
         },
         "natural=beach": {
           "zoom": 13,
@@ -122,7 +122,7 @@
           "zoom": 16,
           "append": "tag:access!=private",
           "taginfo": "leisure=swimming_pool, access!=private",
-          "sign": "<img data-src='maki:swimming?size=11'>"
+          "sign": "<i style='font-size: 80%; color: black;' class='fas fa-swimming-pool'></i>"
         },
         "leisure=sauna": {
           "zoom": 16,