Update stm32duino.com links

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -15,8 +15,8 @@ assignees: ''
 - **Avoid** to submit a GitHub issue for project troubleshooting.
 
 Any questions/feedback/suggestions should be discussed on the [stm32duino forum](http://stm32duino.com):
-  * questions on the [STM32 Core](http://stm32duino.com/viewforum.php?f=48)
-  * bugs/enhancements on the [STM core: Bugs and enhancements](http://stm32duino.com/viewforum.php?f=49)
+  * questions on the [STM32 Core](http://stm32duino.com/viewforum.php?f=35)
+  * bugs/enhancements on the [STM core: Bugs and enhancements](http://stm32duino.com/viewforum.php?f=38)
 
 When reporting any issue, please try to provide all relevant information:
 

CONTRIBUTING.md

@@ -11,8 +11,8 @@ But check the following boxes before posting an issue:
 
 - [ ] `Make sure you are using the latest STM32 core and libraries versions.` See [lastest core here](https://github.com/stm32duino/Arduino_Core_STM32/releases/latest).
 - [ ] `Your issue is NOT a question/feedback/suggestions.` This should be discussed on the [stm32duino forum](http://stm32duino.com):
-  * questions on the [STM32 Core](http://stm32duino.com/viewforum.php?f=48).
-  * bugs/enhancements on the [STM core: Bugs and enhancements](http://stm32duino.com/viewforum.php?f=49).
+  * questions on the [STM32 Core](http://stm32duino.com/viewforum.php?f=35).
+  * bugs/enhancements on the [STM core: Bugs and enhancements](http://stm32duino.com/viewforum.php?f=38).
 - [ ] `Make sure your issue is not already reported/fixed on GitHub or discussed on the forum` See [stm32duino forum](http://stm32duino.com).
 - [ ] `Make sure you are working on the right repository.` See the table below.