Doc: add FOSS4GE-2025 talk

Author: rouault

doc/source/community/index.rst

@@ -91,6 +91,8 @@ Previous
 GDAL presentations have been given at FOSS4G, the leading annual conference for free and open source geospatial software.
 It is the event for those interested in GDAL/OGR, other FOSS geospatial technologies and the community around them.
 
++ `State of GDAL 3.10 & 3.11 <https://download.osgeo.org/gdal/presentations/State%20of%20GDAL%20%28FOSS4G-E%202025%29.pdf>`__
+  by Even Rouault, Spatialys, at `FOSS4G Europe 2025 <https://2025.europe.foss4g.org/>`_ in Mostar, Bosnia-Herzegovina.
 + `State of GDAL 3.8 & 3.9 <https://download.osgeo.org/gdal/presentations/State%20of%20GDAL%20%28FOSS4G-E%202024%29.pdf>`__
   by Even Rouault, Spatialys, at `FOSS4G Europe 2024 <https://2024.europe.foss4g.org/>`_ in Tartu, Estonia. `Recording <https://av.tib.eu/media/68541>`__.
 + `State of GDAL 3.6 & 3.7 <https://download.osgeo.org/gdal/presentations/State%20of%20GDAL%20%28FOSS4G%202023%29.pdf>`__