[Doc] Fix url in chip_heat document (#822)

* add bubble datafile test=develop

* add bubble code test=develop

* add bubble code test=develop

* add bubble code test=develop

* add bubble code

* add bubble data

* add bubble code

* delete mat file

* delete mat file

* bubble code

* delete mat file

* add some modify

* add some modifications

* add some modifications

* add some modifications

* add some modifications

* add some modification

* add some modification

* add some modification

* add some modification

* add some modification

* add some modification(test=document_fix)

* add some modification

* add some modification

* add some modification

* add some modification

* add some code test=develop

* add some code test=develop

* add some code test=develop

* add some code test=develop

* add some code test=develop

* add some code test=develop

* add some code test=develop

* add some code test=develop

* add some code test=develop

* add some code test=develop

* add some code test=develop

* add some code test=develop

* add some code for chip heat simulation

* add some code for chip heat simulation

* add some code for DGMR

* add some code for chip

* add some code for chip

* deleted dgmr code

* add some code for chip heat

* add some code for chip heat

* add some code for chip heat

* add some code for chip heat

* add some code for chip heat

* add some code for chip heat

* add some code for chip heat

* modified some code for chip heat

* modified some code for chip heat

Author: liaoxin2

docs/zh/examples/chip_heat.md

@@ -48,7 +48,7 @@ $$
 $$
 
 <figure markdown>
-  ![domain_chip.pdf](https://paddle-org.bj.bcebos.com/paddlescience/docs/ChipHeat/domain_chip.PNG){ loading=lazy style="height:80%;width:80%" align="center" }
+  ![domain_chip.pdf](https://paddle-org.bj.bcebos.com/paddlescience/docs/ChipHeat/chip_domain.PNG){ loading=lazy style="height:80%;width:80%" align="center" }
   <figcaption> 内部具有随机热源分布的 2D 芯片模拟区域，边界上可以为任意的边界条件。</figcaption>
 </figure>