fix(core): centerInsuffientSlides takes offsets into account (#7437)

Author: slemling

src/core/update/updateSlides.mjs

@@ -269,8 +269,9 @@ export default function updateSlides() {
       allSlidesSize += slideSizeValue + (spaceBetween || 0);
     });
     allSlidesSize -= spaceBetween;
-    if (allSlidesSize < swiperSize) {
-      const allSlidesOffset = (swiperSize - allSlidesSize) / 2;
+    const offsetSize = (params.slidesOffsetBefore || 0) + (params.slidesOffsetAfter || 0);
+    if (allSlidesSize + offsetSize < swiperSize) {
+      const allSlidesOffset = (swiperSize - allSlidesSize - offsetSize) / 2;
       snapGrid.forEach((snap, snapIndex) => {
         snapGrid[snapIndex] = snap - allSlidesOffset;
       });