Fix the ref issue of the checkout action and sqlalchemy (#472)

* Remove head_ref from checkout action

* Fixed the svg errs in sqlalchemy

.github/workflows/build_icons.yml

@@ -6,8 +6,6 @@ jobs:
     runs-on: windows-2019
     steps:
       - uses: actions/checkout@v2
-        with:
-          ref: ${{ github.head_ref }}
       - name: Setup Python v3.8
         uses: actions/setup-python@v2
         with: 

.github/workflows/check_svgs.yml

@@ -6,8 +6,6 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
-        with:
-          ref: ${{ github.head_ref }}
       - name: Setup Python v3.8
         uses: actions/setup-python@v2
         with: 

.github/workflows/peek_icons.yml

@@ -9,8 +9,6 @@ jobs:
     runs-on: windows-2019
     steps:
       - uses: actions/checkout@v2
-        with:
-          ref: ${{ github.head_ref }}
       - name: Setup Python v3.8
         uses: actions/setup-python@v2
         with: 

icons/sqlalchemy/sqlalchemy-original-wordmark.svg

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-	 viewBox="0 0 128 128" style="enable-background:new 0 0 128 128;" xml:space="preserve">
+	 viewBox="0 0 128 128" xml:space="preserve">
 <g transform="matrix(1.3427705,0,0,1.3427705,573.22142,-1004.1027)">
 	<path fill="#333333" d="M-525.44,799.85c-0.5-0.08-1.78-0.4-2.84-0.69l-1.93-0.54l0.99-1.82l0.99-1.82l-0.8-0.99
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icons/sqlalchemy/sqlalchemy-original.svg

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-	 viewBox="0 0 128 128" style="enable-background:new 0 0 128 128;" xml:space="preserve">
+	 viewBox="0 0 128 128" xml:space="preserve">
 <g transform="matrix(1.3427705,0,0,1.3427705,573.22142,-1004.1027)">
 	<path fill="#333333" d="M-415.22,799.85c-0.5-0.08-1.78-0.4-2.84-0.69l-1.93-0.54l0.99-1.82l0.99-1.82l-0.8-0.99
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icons/sqlalchemy/sqlalchemy-plain.svg

@@ -1,33 +1,9 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="UTF-8"?>
-<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="128px" height="128px" viewBox="0 0 128 128" version="1.1">
-	 viewBox="0 0 128.44 128.44" style="enable-background:new 0 0 128.44 128.44;" xml:space="preserve">
+<g id="surface1">
-<g transform="matrix(1.3427705,0,0,1.3427705,573.22142,-1004.1027)">
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