Display memory in bytes instead of MB for consistency

- Changed output to show bytes instead of MB
- Updated header to show 'Minne (bytes)'
- Better for comparing memory usage across all languages
- Memory data already collected in bytes from ps command

timelines/PHP/run_1.tsv

@@ -1,6 +1,15 @@
-8 2064384 0
-30 2080768 0
-52 2080768 0
-74 2080768 0
-95 2080768 0
-118 2080768 0
+8 2015232 0
+19 2080768 0
+31 2080768 0
+42 2080768 0
+53 2080768 0
+65 2080768 0
+76 2080768 0
+88 2080768 0
+100 2080768 0
+111 2080768 0
+122 2080768 0
+134 2080768 0
+145 2080768 0
+156 2080768 0
+166 2080768 0