fix invalid syntax in workflow file

re-reading #15300, it had a typo in it

Author: AlexWaygood

.github/workflows/build-docker.yml

@@ -200,7 +200,7 @@ jobs:
           # Order is on purpose such that the label org.opencontainers.image.version has the first pattern with the full version
           IFS=','; for TAG in ${BASE_TAGS}; do
             TAG_PATTERNS="${TAG_PATTERNS}type=pep440,pattern={{ version }},suffix=-${TAG},value=${TAG_VALUE}\n"
-            TAG_PATTERNS="${TAG_PATTERNS}type=pep440,pattern={{ major }}.{{ minor }},suffix=-${TAG},value=${TAG_VALUE}}\n"
+            TAG_PATTERNS="${TAG_PATTERNS}type=pep440,pattern={{ major }}.{{ minor }},suffix=-${TAG},value=${TAG_VALUE}\n"
             TAG_PATTERNS="${TAG_PATTERNS}type=raw,value=${TAG}\n"
           done