update branding guidelines

Signed-off-by: Christopher Guindon <chris.guindon@eclipse-foundation.org>
diff --git a/documents/eclipse_foundation_branding_guidelines-June-2020.pdf b/documents/eclipse_foundation_branding_guidelines-June-2020.pdf
deleted file mode 100644
index 22a2a08..0000000
--- a/documents/eclipse_foundation_branding_guidelines-June-2020.pdf
+++ /dev/null
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diff --git a/documents/eclipse_foundation_branding_guidelines.pdf b/documents/eclipse_foundation_branding_guidelines.pdf
index a4845b3..22a2a08 100644
--- a/documents/eclipse_foundation_branding_guidelines.pdf
+++ b/documents/eclipse_foundation_branding_guidelines.pdf
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