fix(README):Correct URL to Wikimedia Commons ISO 10628 PDF

diff --git a/README.org b/README.org
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--- a/README.org
+++ b/README.org
@@ -13,7 +13,7 @@ See the [[File:REVISION.org][drawing revision history]] for a list of tracked fi
 
 Some drawings may be uploaded to Wikimedia Commons. Notable sets include:
 
-- [[https://commons.wikimedia.org/wiki/File:Technical_drawing_templates_(ISO_5457_1999_Sizes_A0-A4).pdf][BK-2020-04-PID-1]]: Chemical engineering symbols ([[https://en.wikipedia.org/wiki/ISO_10628][ISO 10628]]-2:2012 Symbols)
+- [[https://commons.wikimedia.org/wiki/File:ISO_10628-2_2012_Symbols.pdf][BK-2020-04-PID-1]]: Chemical engineering symbols ([[https://en.wikipedia.org/wiki/ISO_10628][ISO 10628]]-2:2012 Symbols)
 - [[https://commons.wikimedia.org/wiki/File:Technical_drawing_templates_(ISO_5457_1999_Sizes_A0-A4).pdf][BK-2020-04-TMP-1]]: Technical drawing templates (ISO 5457:1999 Sizes A0—A4)
 
 ** Contents