Fix: Updated get-diff-action to include base for full git history

Author: Shrishti Banshiar

.github/workflows/testing.yml

@@ -695,20 +695,21 @@ jobs:
         run: git fetch --prune --unshallow
       - uses: technote-space/get-diff-action@f27caffdd0fb9b13f4fc191c016bb4e0632844af # v6.1.2
         with:
-          PATTERNS: |
-            cve_bin_tool/data_sources/*.py
-          FILES: |
-            test_available_fix.py
-            test_source_osv.py
-            test_source_gad.py
-            test_source_nvd.py
-            test_cli.py
-            test_nvd_api.py
-            test_cvedb.py
-            test_scanner.py
-            cli.py
-            nvd_api.py
-            cvedb.py
+            base: main
+            PATTERNS: 
+              cve_bin_tool/data_sources/*.py
+            FILES: 
+              test_available_fix.py
+              test_source_osv.py
+              test_source_gad.py
+              test_source_nvd.py
+              test_cli.py
+              test_nvd_api.py
+              test_cvedb.py
+              test_scanner.py
+              cli.py
+              nvd_api.py
+              cvedb.py
       - uses: haya14busa/action-cond@94f77f7a80cd666cb3155084e428254fea4281fd # v1.2.1
         id: git-diff
         with: