Fix shasum invocation, -q is not supported everywhere

.github/workflows/check-shasum.yaml

@@ -19,4 +19,4 @@ jobs:
     - name: Checkout the ref referenced in README.md
       run: git checkout -q "$(grep -m1 'wget -qO- https' README.md | sed 's#^.*orbit-online/upkg/\([^/]\+\)/upkg\.sh.*$#\1#')"
     - name: Check if the shasum from README.md matches the shasum of upkg.sh
-      run: printf '%s  upkg.sh\n' "$(grep -m1 'shasum -qa 256' README.md | sed 's/^.*\([a-f0-9]\{64\}\).*$/\1/')" | shasum -a 256 -c -
+      run: printf '%s  upkg.sh\n' "$(grep -m1 'shasum -a 256' README.md | sed 's/^.*\([a-f0-9]\{64\}\).*$/\1/')" | shasum -a 256 -c -

README.md

@@ -44,7 +44,7 @@ You can also paste this directly into a Dockerfile `RUN` command, no escaping ne
 
 ```
 bash -ec 'src=$(wget -qO- https://raw.githubusercontent.com/orbit-online/upkg/v0.12.0/upkg.sh); \
-shasum -qa 256 -c <(printf "866d456f0dcfdb71d2aeab13f6202940083aacb06d471782cec3561c0ff074b0  -") <<<"$src"; \
+shasum -a 256 -c <(printf "866d456f0dcfdb71d2aeab13f6202940083aacb06d471782cec3561c0ff074b0  -") <<<"$src"; \
 set - install -g orbit-online/upkg@v0.12.0; eval "$src"'
 ```
 
@@ -145,7 +145,7 @@ any package you like. For example:
 
 ```
 bash -ec 'src=$(wget -qO- https://raw.githubusercontent.com/orbit-online/upkg/v0.12.0/upkg.sh); \
-shasum -qa 256 -c <(printf "866d456f0dcfdb71d2aeab13f6202940083aacb06d471782cec3561c0ff074b0  -") <<<"$src"; \
+shasum -a 256 -c <(printf "866d456f0dcfdb71d2aeab13f6202940083aacb06d471782cec3561c0ff074b0  -") <<<"$src"; \
 set - install -g orbit-online/bitwarden-container@v2023.7.0-4; eval "$src"'
 ```