change the name golang to go

Author: Julian

contents/graham_scan/graham_scan.md

@@ -23,7 +23,7 @@ We can find whether a rotation is counter-clockwise with trigonometric functions
 {% sample lang="py" %}
 [import:4-6, lang:"python"](code/python/grahamScan.py)
 {% sample lang="go" %}
-[import:13-15, lang:"golang"](code/golang/graham.go)
+[import:13-15, lang:"go"](code/golang/graham.go)
 {% endmethod %}
 
 If the output of this function is 0, the points are collinear.
@@ -49,7 +49,7 @@ In the end, the code should look something like this:
 {% sample lang="py" %}
 [import:14-27, lang:"python"](code/python/grahamScan.py)
 {% sample lang="go" %}
-[import:21-42, lang:"golang"](code/golang/graham.go)
+[import:21-42, lang:"go"](code/golang/graham.go)
 {% endmethod %}
 
 ### Bibliography
@@ -70,7 +70,7 @@ In the end, the code should look something like this:
 {% sample lang="py" %}
 [import, lang:"python"](code/python/grahamScan.py)
 {% sample lang="go" %}
-[import, lang:"golang"](code/golang/graham.go)
+[import, lang:"go"](code/golang/graham.go)
 {% endmethod %}
 
 <script>