Update swagger annotations of get current quarter and fix usage of wr…

…ong implementation class for get current quarters

backend/src/main/java/ch/puzzle/okr/controller/QuarterController.java

@@ -28,15 +28,15 @@ public QuarterController(QuarterBusinessService quarterBusinessService) {
 
     @Operation(summary = "Get quarters", description = "Get a List of quarters depending on current date")
     @ApiResponses(value = { @ApiResponse(responseCode = "200", description = "Returned a List of quarters", content = {
-            @Content(mediaType = "application/json", schema = @Schema(implementation = TeamDto.class)) }) })
+            @Content(mediaType = "application/json", schema = @Schema(implementation = Quarter.class)) }) })
     @GetMapping("")
     public ResponseEntity<List<Quarter>> getCurrentQuarters() {
         return ResponseEntity.status(HttpStatus.OK).body(this.quarterBusinessService.getQuarters());
     }
 
-    @Operation(summary = "Get quarters", description = "Get a List of quarters depending on current date")
-    @ApiResponses(value = { @ApiResponse(responseCode = "200", description = "Returned a List of quarters", content = {
-            @Content(mediaType = "application/json", schema = @Schema(implementation = TeamDto.class)) }) })
+    @Operation(summary = "Get current quarter", description = "Get the current quarter depending on current date")
+    @ApiResponses(value = { @ApiResponse(responseCode = "200", description = "Returned the current quarter", content = {
+            @Content(mediaType = "application/json", schema = @Schema(implementation = Quarter.class)) }) })
     @GetMapping("/current")
     public ResponseEntity<Quarter> getCurrentQuarter() {
         return ResponseEntity.status(HttpStatus.OK).body(this.quarterBusinessService.getCurrentQuarter());