build: adding dependabot to ignore list for license header

Signed-off-by: Bryan Cole <[email protected]>

Author: ColePBryan

.github/workflows/license_headers_check.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Install addlicense
         run: |
           wget https://github.com/google/addlicense/releases/download/v1.1.1/addlicense_1.1.1_Linux_x86_64.tar.gz
-          tar -xzf addlicense_1.1.1_Linux_x86_64.tar.gz 
+          tar -xzf addlicense_1.1.1_Linux_x86_64.tar.gz
           sudo mv addlicense /usr/local/bin
       - name: Check license headers
         run: >
@@ -26,4 +26,5 @@ jobs:
             -s=only \
             -ignore '.github/workflows/*.yml' \
             -ignore '.github/workflows/*.yaml' \
+            -ignore '.github/dependabot.yml' \
             .