Remove files to allow copy when targets are identical

Fixes:

```
cp: LICENSE and /Users/ec2-user/actions-runner/_work/amalthea/amalthea/LICENSE are identical (not copied).
Error: Process completed with exit code 1.
```

But do we even need to copy?

Author: lionel-

.github/workflows/release-linux.yml

@@ -47,8 +47,9 @@ jobs:
 
                   # Compress the kernel to an archive
                   ARCHIVE="$GITHUB_WORKSPACE/ark-${{ inputs.version }}-${{ matrix.flavor }}-linux-x64.zip"
-                  cp -f "$GITHUB_WORKSPACE/LICENSE" LICENSE
-                  cp -f "$GITHUB_WORKSPACE/crates/ark/NOTICE" NOTICE
+                  rm -f LICENSE NOTICE
+                  cp "$GITHUB_WORKSPACE/LICENSE" LICENSE
+                  cp "$GITHUB_WORKSPACE/crates/ark/NOTICE" NOTICE
                   zip -Xry $ARCHIVE ark LICENSE NOTICE
 
                   popd

.github/workflows/release.yml

@@ -260,8 +260,9 @@ jobs:
 
                   # Compress and bundle licenses
                   ARCHIVE="$GITHUB_WORKSPACE/ark-${{ needs.get_version.outputs.ARK_VERSION }}${{ env.DEBUG_FLAG }}-darwin-universal.zip"
-                  cp -f "$GITHUB_WORKSPACE/LICENSE" LICENSE
-                  cp -f "$GITHUB_WORKSPACE/crates/ark/NOTICE" NOTICE
+                  rm -f LICENSE NOTICE
+                  cp "$GITHUB_WORKSPACE/LICENSE" LICENSE
+                  cp "$GITHUB_WORKSPACE/crates/ark/NOTICE" NOTICE
                   zip -Xry $ARCHIVE ark LICENSE NOTICE
 
             - name: Upload macOS release artifact (universal)