small fixes

Changed static usages of metadatamethods, fixed ambum error.

src/test/java/NTNU/IDATT1002/utils/MetaDataExtractorTest.java

@@ -58,7 +58,7 @@ class MetaDataExtractorTest {
 
   @Test
   void testGetLens() {
-    String expectedLens = "Lens Specification: 24-70mm f/2,8, Lens Model: 24.0-70.0 mm f/2.8";
+    String expectedLens = "Lens Specification: 24-70mm f/2.8, Lens Model: 24.0-70.0 mm f/2.8";
     String extractedLens = MetaDataExtractor.getLens(metadataImage);
     assertEquals(expectedLens, extractedLens);
   }
@@ -68,7 +68,7 @@ class MetaDataExtractorTest {
    */
   @Test
   void testGetAperture() {
-    String expectedAperture = "Aperture Value: f/2,8, Max Aperture Value: f/2,8";
+    String expectedAperture = "Aperture Value: f/2.8, Max Aperture Value: f/2.8";
     String extractedAperture = MetaDataExtractor.getAperture(metadataImage);
     assertEquals(expectedAperture, extractedAperture);
   }