Fix link to developer's guide

Author: DelazJ

.github/CONTRIBUTE.md

@@ -21,5 +21,5 @@ Getting your pull request merged
 This is a volunteer project, so sometimes it may take a little while to merge
 your pull request.
 
-There is a [guide with hints for getting your pull requests merged](https://www.qgis.org/en/site/getinvolved/development/qgisdevelopersguide/git.html#pull-requests)
+There is a [guide with hints for getting your pull requests merged](https://docs.qgis.org/testing/en/docs/developers_guide/git.html#pull-requests)
 in the developers guide.

.github/PULL_REQUEST_TEMPLATE.md

@@ -9,7 +9,7 @@ Include a few sentences describing the overall goals for this PR (pull request).
 - [ ] Commits which fix bugs include `fixes #11111` in the commit message next to the description
 - [ ] Commits which add new features are tagged with `[FEATURE]` in the commit message
 - [ ] Commits which change the UI or existing user workflows are tagged with `[needs-docs]` in the commit message and containt sufficient information in the commit message to be documented
-- [ ] I have read the [QGIS Coding Standards](https://www.qgis.org/en/site/getinvolved/development/qgisdevelopersguide/codingstandards.html) and this PR complies with them
+- [ ] I have read the [QGIS Coding Standards](https://docs.qgis.org/testing/en/docs/developers_guide/codingstandards.html) and this PR complies with them
 - [ ] This PR passes all existing unit tests (test results will be reported by travis-ci after opening this PR)
 - [ ] New unit tests have been added for core changes
 - [ ] I have run [the `scripts/prepare-commit.sh` script](https://github.com/qgis/QGIS/blob/master/.github/CONTRIBUTE.md#contributing-to-qgis) before each commit