fix : chessboard test and template issues

exercises/concept/chessboard/.meta/Sources/Chessboard/ChessboardExemplar.swift

@@ -1,7 +1,7 @@
 let ranks = 1...8
 let files = "A"..."H"
 
-func isVaildSquare(rank: Int, file: String) -> Bool {
+func isValidSquare(rank: Int, file: String) -> Bool {
   return ranks.contains(rank) && files.contains(file)
 }
 

exercises/concept/chessboard/Sources/Chessboard/Chessboard.swift

@@ -2,10 +2,10 @@
 // TODO: define the 'files' constant
 
 
-func isVaildSquare(rank: Int, file: String) -> Bool {
-  fatalError("Please implement the isVaildSquare(rank:file:) function")
+func isValidSquare(rank: Int, file: String) -> Bool {
+  fatalError("Please implement the isValidSquare(rank:file:) function")
 }
 
 func getRow(_ board : [String], rank: Int) -> [String] {
-  fatalError("Please implement the isVaildSquare(_:rank:) function")
+  fatalError("Please implement the getRow(_:rank:) function")
 }

exercises/concept/chessboard/Tests/ChessboardTests/ChessboardTests.swift

@@ -33,35 +33,35 @@ let RUNALL = Bool(ProcessInfo.processInfo.environment["RUNALL", default: "true"]
   func testValidSquare() {
     let rank = 1
     let file = "A"
-    #expect(isVaildSquare(rank: rank, file: file))
+    #expect(isValidSquare(rank: rank, file: file))
   }
 
   @Test("that it returns true for another valid square", .enabled(if: RUNALL))
   func testAnotherValidSquare() {
     let rank = 8
     let file = "H"
-    #expect(isVaildSquare(rank: rank, file: file))
+    #expect(isValidSquare(rank: rank, file: file))
   }
 
   @Test("that it returns false when rank is out of range", .enabled(if: RUNALL))
   func testRankOutOfRange() {
     let rank = 9
     let file = "B"
-    #expect(!isVaildSquare(rank: rank, file: file))
+    #expect(!isValidSquare(rank: rank, file: file))
   }
 
   @Test("that it returns false when file is out of range", .enabled(if: RUNALL))
   func testFileOutOfRange() {
     let rank = 1
     let file = "I"
-    #expect(!isVaildSquare(rank: rank, file: file))
+    #expect(!isValidSquare(rank: rank, file: file))
   }
 
   @Test("that it returns false when rank is less than one", .enabled(if: RUNALL))
   func testRankLessThanOne() {
     let rank = 0
     let file = "A"
-    #expect(!isVaildSquare(rank: rank, file: file))
+    #expect(!isValidSquare(rank: rank, file: file))
   }
 
   @Test("that is returns correct first row", .enabled(if: RUNALL))