Update 2025_lhc.md (#211)

reducing estimated beam time for pb ion part 3 to reflect time spent in measurement (extended period with no measurements done as OP was unable to ramp)

Co-authored-by: Felix Soubelet <[email protected]>

Author: emaclean

docs/logbook/LHC/2025_lhc.md

@@ -42,7 +42,7 @@ The tables below can be sorted by clicking next to the column headers.
 | 2025-06-28 12:00 | 2025-06-29 05:00 |   0.5H 1HN   | Commissioning |                 OO Commissioning                 |       [Shift Start](logbook://2025-06-28,1081,4328097) / [Summary](logbook://2025-06-29,1081,4328684) ([OP][op_oo_commissioning]{.cern_login target=_blank})       |
 | 2025-09-03 00:00 | 2025-09-03 04:00 |    0.5WN     |    MD15003    |    Valiation of combined ramp/squeeze/rotate     |           [Shift Start](logbook://2025-09-03,1081,4377865) / [Summary](logbook://2025-09-03,1081,4378088) ([OP][op_MD15003]{.cern_login target=_blank})            |
 | 2025-09-04 23:00 | 2025-09-05 07:45 |    1.1WN     |    MD15464    |    Refining optics corrections at top energy     |           [Shift Start](logbook://2025-09-04,1081,4380286) / [Summary](logbook://2025-09-05,1081,4384687) ([OP][op_MD15464]{.cern_login target=_blank})            |
-| 2025-09-08 04:00 | 2025-09-08 08:30 |    0.5HN     | Commissioning |               Pb Ion Optics Part 3               |                                                          [Shift Start](logbook://2025-09-08,1081,4382873)                                                          |
+| 2025-09-08 04:00 | 2025-09-08 08:30 |    0.2HN     | Commissioning |               Pb Ion Optics Part 3               |                                                          [Shift Start](logbook://2025-09-08,1081,4382873)                                                          |
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