Update GAMS version

[siddharth-krishna]

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Regression test results on commit 70c8b98

         Benchmark    Time (s)                 GDX Diff     Accuracy       Correct    Additional
------------------  ----------  -----------------------  -----------  ------------  ------------
     DemoS_001-all   2.0   2.5            OK         OK  100.0 100.0    118    118      3      3
     DemoS_002-all   2.5   3.0            OK         OK  100.0 100.0    344    344      3      3
     DemoS_003-all   2.7   3.1            OK         OK  100.0 100.0    633    633      6      6
         DemoS_004   2.8   3.7            OK         OK  100.0 100.0    662    662     12     12
        DemoS_004a   3.0   3.1            OK         OK  100.0 100.0    665    665     12     12
DemoS_004a-ie-test   2.9   3.3            OK         OK  100.0 100.0    667    667     12     12
        DemoS_004b   3.0   3.7            OK         OK  100.0 100.0    665    665     12     12
     DemoS_004-all   3.0   4.0            OK         OK  100.0 100.0    667    667     12     12
     DemoS_005-all   3.4   4.0            13         13   99.7  99.7   1160   1160     12     12
     DemoS_006-all   4.1   5.2            13         13   99.7  99.7   1258   1258     12     12
     DemoS_007-all   5.2   6.7            13         13   99.8  99.8   2155   2155     12     12
  DemoS_007-all-1r   4.1   4.4            11         11   99.8  99.8   1179   1179     12     12
     DemoS_008-all   6.8   8.2            13         13   99.9  99.9   5333   5333     18     18
     DemoS_009-all   7.7   8.4            32         32   99.9  99.9   5807   5807     29     29
     DemoS_010-all   8.3   8.6            48         44   99.9  99.9   6941   6941     29     29
     DemoS_011-all   8.0   8.6            30         26   99.9  99.9   6982   6982     29     29
     DemoS_012-all   8.2   8.2            82         78   99.9  99.9   7149   7149     53     53
  DemoS_special-t1   4.1   4.1  Error runn… Error runn…   92.2  92.2   2108   2108     42     42
      TIMES-IE-all  23.9  24.0          3125       3125   97.5  97.5  42461  42461   2826   2826
      TIMES-IE-NoM  21.3  21.3           357        357   99.3  99.3  40529  40529    632    632
      TIMES-IE-MCB  21.9  22.0          1100       1100   97.6  97.6  42068  42068    632    632
      TIMES-NZ-KEA  25.3  25.5          3877       3877   98.5  98.5  76487  76487    341    341
      TIMES-NZ-TUI  16.9  16.5          3887       3887   98.5  98.5  76123  76123    347    347

2025-08-27 09:10:37.928 |     INFO : Total runtime: 201.86s (main: 191.34s)
2025-08-27 09:10:37.929 |     INFO : Change in runtime (negative == faster): +10.52s (+5.5%)
2025-08-27 09:10:37.929 |     INFO : Change in correct rows (higher == better): +0 (+0.0%)
2025-08-27 09:10:37.929 |     INFO : Change in additional rows: +0 (+0.0%)
2025-08-27 09:10:37.929 |  SUCCESS : No regressions. You're awesome!

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