PR#2329: docs: align "Hub" text in diagram

Merges #2329
https://pagure.io/koji/pull-request/2329

docs/source/koji_structure1.svg

@@ -318,23 +318,22 @@
          transform="translate(4.054306,-1.3042387)"
          id="g4145">
         <circle
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            id="path3185"
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-           cx="502.20462"
-           cy="399.22089"
+           cx="533.29272"
+           cy="652.92761"
            r="90.269691" />
         <text
-           id="text4137"
-           y="671.17914"
-           x="525.05676"
-           style="font-style:normal;font-weight:normal;line-height:0%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#ffffff;fill-opacity:1;stroke:none;text-anchor:middle;text-align:center;"
-           xml:space="preserve"><tspan
-             y="671.17914"
-             x="482.45911"
-             id="tspan4139"
+           xml:space="preserve"
+           style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:40px;line-height:1.25;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Bold';font-variant-ligatures:normal;font-variant-position:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-alternates:normal;font-variant-east-asian:normal;text-indent:0;text-align:start;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:0px;word-spacing:0px;text-transform:none;writing-mode:lr-tb;direction:ltr;text-orientation:mixed;dominant-baseline:auto;baseline-shift:baseline;text-anchor:start;white-space:normal;shape-padding:0;opacity:1;vector-effect:none;fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+           x="532.35522"
+           y="667.83972"
+           id="text4141-2"><tspan
+             style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:40px;line-height:1.25;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Bold';font-variant-ligatures:normal;font-variant-position:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-alternates:normal;font-variant-east-asian:normal;text-indent:0;text-align:center;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:0px;word-spacing:0px;text-transform:none;writing-mode:lr-tb;direction:ltr;text-orientation:mixed;dominant-baseline:auto;baseline-shift:baseline;text-anchor:middle;white-space:normal;shape-padding:0;vector-effect:none;fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+             id="tspan7286-2"
              sodipodi:role="line"
-             style="font-weight:bold;font-size:40px;line-height:1.25;font-family:sans-serif;fill:#ffffff;fill-opacity:1;text-anchor:middle;text-align:center;">Hub</tspan></text>
+             x="532.35522"
+             y="667.83972">Hub</tspan></text>
       </g>
     </g>
     <g